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1,802.0166 | Significant efficiency enhancement in thin film solar cells using laser
beam-induced graphene transparent conductive electrodes | Thin film solar cells have been attractive for decades in advanced green
technology platforms due to its possibilities to be integrated with buildings
and on-chip applications. However, the bottleneck issues involved to consider
the current solar cells as a major electricity source includes the lower
efficiencies and cost-effectiveness. We numerically demonstrate the concept of
the absorption enhancement in thin-film amorphous silicon solar cells using the
laser beam-induced graphene material based on the insensitive polarization
space-filling fractal design as transparent conductive electrodes. With the
optimization of parameters such as thickness, width, and period of fractals, an
enhancement of photocurrent generation of solar cells by a factor of 24.5% is
achieved compared to reference solar cell with a traditional ITO.
| physics.app-ph physics.optics | thin film solar cells have been attractive for decades in advanced green technology platforms due to its possibilities to be integrated with buildings and onchip applications however the bottleneck issues involved to consider the current solar cells as a major electricity source includes the lower efficiencies and costeffectiveness we numerically demonstrate the concept of the absorption enhancement in thinfilm amorphous silicon solar cells using the laser beaminduced graphene material based on the insensitive polarization spacefilling fractal design as transparent conductive electrodes with the optimization of parameters such as thickness width and period of fractals an enhancement of photocurrent generation of solar cells by a factor of 245 is achieved compared to reference solar cell with a traditional ito | [['thin', 'film', 'solar', 'cells', 'have', 'been', 'attractive', 'for', 'decades', 'in', 'advanced', 'green', 'technology', 'platforms', 'due', 'to', 'its', 'possibilities', 'to', 'be', 'integrated', 'with', 'buildings', 'and', 'onchip', 'applications', 'however', 'the', 'bottleneck', 'issues', 'involved', 'to', 'consider', 'the', 'current', 'solar', 'cells', 'as', 'a', 'major', 'electricity', 'source', 'includes', 'the', 'lower', 'efficiencies', 'and', 'costeffectiveness', 'we', 'numerically', 'demonstrate', 'the', 'concept', 'of', 'the', 'absorption', 'enhancement', 'in', 'thinfilm', 'amorphous', 'silicon', 'solar', 'cells', 'using', 'the', 'laser', 'beaminduced', 'graphene', 'material', 'based', 'on', 'the', 'insensitive', 'polarization', 'spacefilling', 'fractal', 'design', 'as', 'transparent', 'conductive', 'electrodes', 'with', 'the', 'optimization', 'of', 'parameters', 'such', 'as', 'thickness', 'width', 'and', 'period', 'of', 'fractals', 'an', 'enhancement', 'of', 'photocurrent', 'generation', 'of', 'solar', 'cells', 'by', 'a', 'factor', 'of', '245', 'is', 'achieved', 'compared', 'to', 'reference', 'solar', 'cell', 'with', 'a', 'traditional', 'ito']] | [-0.05873396901129666, 0.1306465355220884, 0.04990703873809869, -0.0008533476423708943, -0.020798139287932317, -0.11876695016862714, 0.06345932829288482, 0.4448069363706193, -0.23812811181612187, -0.3321407113887243, 0.08118191998554551, -0.2651155270257239, -0.14909450942255809, 0.2801793695514296, -0.1173183692627097, 0.08424589205957492, 0.028194344813651327, -0.11165440663048146, -0.01312052948060998, -0.18098488331069948, 0.20757704504402513, 0.09070292208738373, 0.35215423439463633, 0.04831743385974255, 0.103386772563681, -0.08377601212481041, 0.019117324923557798, -0.014981538404600096, -0.09757863663105389, 0.15053116566485772, 0.2572172420174357, 0.006574799022558382, 0.24981222030611994, -0.5165224920689934, -0.2543835095090444, -0.0018796263720398231, 0.13156286073785464, 0.033604528522118926, -0.10212578175498678, -0.19461280916485998, 0.07560333891542849, -0.14801908383082787, -0.15202561206326393, 0.033573825432232314, 0.03211737826310682, 0.043150125299304155, -0.24508640840028065, 0.02023209427025611, -0.009257661610825967, 0.07368518660975604, -0.046184590440026436, -0.14275000824482512, -0.04242855709803812, 0.11463105158832998, 0.017276066443212015, -0.0230976671337592, 0.2641818769156767, -0.10076715101752336, -0.13009966519992736, 0.3886530665459774, -0.04035233211766739, -0.11510958530253462, 0.16743151024496972, -0.1359419323251409, 0.00023912500503267778, 0.1555362108698257, 0.1711349567177437, 0.07157995852136637, -0.19267653099703208, 0.04745430314481274, 0.038017983769334976, 0.1867026827412547, 0.1306343028081139, 0.09415799680154108, 0.2282456838293001, 0.31360896814898664, 0.06172060071080292, 0.14217464698348353, -0.13099189703471137, -0.029662764283938933, -0.1820826289651943, -0.19885377420538689, -0.13593034121065828, 0.08813540182092179, -0.09975494853957355, -0.21613173082597176, 0.4020398385128227, 0.1324825361449966, 0.12480882028023065, -0.057783335391076884, 0.33987235887197115, 0.09318051857861959, 0.14913279937160442, 0.010052172005397536, 0.27788644151414854, 0.14966023098124917, 0.19702263812002258, -0.21782977159640168, 0.057962464002923944, 0.009290103780863396] |
1,802.01661 | A priori bounds and multiplicity for fully nonlinear equations with
quadratic growth in the gradient | We consider fully nonlinear uniformly elliptic equations with quadratic
growth in the gradient, such as $$ -F(x,u,Du,D^2u) =\lambda c(x)u+\langle M(x)D
u, D u \rangle +h(x) $$ in a bounded domain with a Dirichlet boundary
condition, here $\lambda \in\mathbb{R}$, $c,\, h \in L^p(\Omega)$, $p>n\geq 1$,
$c\gneqq 0$ and the matrix $M$ satisfies $0<\mu_1 I\leq M\leq \mu_2 I$.
Recently this problem was studied in the "coercive" case $\lambda c\le0$, where
uniqueness of solutions can be expected, and it was conjectured that the
solution set is more complex for noncoercive equations. This conjecture was
verified in 2015 by Arcoya, de Coster, Jeanjean and Tanaka for equations in
divergence form, by exploiting the integral formulation of the problem. Here we
show that similar phenomena occur for general, even fully nonlinear, equations
in nondivergence form. We use different techniques based on the maximum
principle.
We develop a new method to obtain the crucial uniform a priori bounds, which
permit to us to use degree theory. This method is based on basic regularity
estimates such as half-Harnack inequalities, and on a V\'azquez type strong
maximum principle for our kind of equations.
| math.AP | we consider fully nonlinear uniformly elliptic equations with quadratic growth in the gradient such as fxudud2u lambda cxulangle mxd u d u rangle hx in a bounded domain with a dirichlet boundary condition here lambda inmathbbr c h in lpomega pngeq 1 cgneqq 0 and the matrix m satisfies 0mu_1 ileq mleq mu_2 i recently this problem was studied in the coercive case lambda cle0 where uniqueness of solutions can be expected and it was conjectured that the solution set is more complex for noncoercive equations this conjecture was verified in 2015 by arcoya de coster jeanjean and tanaka for equations in divergence form by exploiting the integral formulation of the problem here we show that similar phenomena occur for general even fully nonlinear equations in nondivergence form we use different techniques based on the maximum principle we develop a new method to obtain the crucial uniform a priori bounds which permit to us to use degree theory this method is based on basic regularity estimates such as halfharnack inequalities and on a vazquez type strong maximum principle for our kind of equations | [['we', 'consider', 'fully', 'nonlinear', 'uniformly', 'elliptic', 'equations', 'with', 'quadratic', 'growth', 'in', 'the', 'gradient', 'such', 'as', 'fxudud2u', 'lambda', 'cxulangle', 'mxd', 'u', 'd', 'u', 'rangle', 'hx', 'in', 'a', 'bounded', 'domain', 'with', 'a', 'dirichlet', 'boundary', 'condition', 'here', 'lambda', 'inmathbbr', 'c', 'h', 'in', 'lpomega', 'pngeq', '1', 'cgneqq', '0', 'and', 'the', 'matrix', 'm', 'satisfies', '0mu_1', 'ileq', 'mleq', 'mu_2', 'i', 'recently', 'this', 'problem', 'was', 'studied', 'in', 'the', 'coercive', 'case', 'lambda', 'cle0', 'where', 'uniqueness', 'of', 'solutions', 'can', 'be', 'expected', 'and', 'it', 'was', 'conjectured', 'that', 'the', 'solution', 'set', 'is', 'more', 'complex', 'for', 'noncoercive', 'equations', 'this', 'conjecture', 'was', 'verified', 'in', '2015', 'by', 'arcoya', 'de', 'coster', 'jeanjean', 'and', 'tanaka', 'for', 'equations', 'in', 'divergence', 'form', 'by', 'exploiting', 'the', 'integral', 'formulation', 'of', 'the', 'problem', 'here', 'we', 'show', 'that', 'similar', 'phenomena', 'occur', 'for', 'general', 'even', 'fully', 'nonlinear', 'equations', 'in', 'nondivergence', 'form', 'we', 'use', 'different', 'techniques', 'based', 'on', 'the', 'maximum', 'principle', 'we', 'develop', 'a', 'new', 'method', 'to', 'obtain', 'the', 'crucial', 'uniform', 'a', 'priori', 'bounds', 'which', 'permit', 'to', 'us', 'to', 'use', 'degree', 'theory', 'this', 'method', 'is', 'based', 'on', 'basic', 'regularity', 'estimates', 'such', 'as', 'halfharnack', 'inequalities', 'and', 'on', 'a', 'vazquez', 'type', 'strong', 'maximum', 'principle', 'for', 'our', 'kind', 'of', 'equations']] | [-0.12006633382605453, 0.06734752951888368, -0.07072116249632514, 0.054335312837793026, -0.11039440221925774, -0.16648545428655448, -0.01599568642202278, 0.30953685481191234, -0.29416223264442204, -0.24374956313906956, 0.10811978930525418, -0.2668177822951376, -0.15496680188648912, 0.18368983508579814, -0.06225084241966463, 0.0859971579748989, 0.044305057934252545, 0.03735352913976054, -0.06230865209760272, -0.23677599109148353, 0.33786062205432577, -0.06595774173249745, 0.21956343624862545, 0.053776302628896454, 0.12297530728855319, 0.0022516894082813947, 0.04226031148441094, 0.03255213769576089, -0.2320508382774113, 0.10027948628538236, 0.23489650270097295, 0.10259811022181319, 0.2959117682343772, -0.39809729609723116, -0.18698447728369996, 0.12520771110642023, 0.11337754549590913, 0.05477492601477769, -0.02153865616963396, -0.26073730892147234, 0.1288764643898255, -0.10997243473957496, -0.17998385864087718, -0.06333183535290035, 0.05049349334016866, 0.04389074773611024, -0.3526510138475384, 0.117977188901436, 0.10102229594088964, 0.03605515304066516, -0.08748680349460548, -0.12945059574651002, 0.007733898277034645, 0.024685247451998293, -0.005294630610230591, 0.054882286484247415, -0.016150305310888638, -0.0831195445987925, -0.06741956926601812, 0.3323882080466402, -0.11287841473875398, -0.2638123606395146, 0.1255966225501404, -0.14159582911154509, -0.15945782155772162, 0.07592614177371036, 0.1477749056516173, 0.2087767707840116, -0.1373974354249764, 0.1853014830412576, -0.07936376743203834, 0.13249987828947435, 0.10171049089297991, -0.026341570648086912, 0.06934286730723795, 0.09505950248355723, 0.12140939249630636, 0.10419603772739224, -0.007776601790365848, -0.053955434587392534, -0.3410637619589662, -0.16199584347486962, -0.16620298062546432, 0.11838382888725557, -0.08910305372575583, -0.14709599746790694, 0.2935346562351862, 0.10892169513284568, 0.1579473689370471, 0.05607071493035288, 0.18910670556678352, 0.1807403245383367, 0.018714065124434208, 0.10664876013867218, 0.19267840975226136, 0.1826130429412429, 0.1253665055423467, -0.1869655258084425, 0.049782836776020384, 0.15750830772619587] |
1,802.01662 | Characterizing Germanium Junction Transistors | Transistors have provided the basis of modern electronics. Being relatively
intricate devices, and often exhibiting intense parameter variation, this type
of electronic devices has motivated much research interest especially regarding
their characterization and modeling. In this work, we apply a recently reported
modeling methodology, based on the Early effect, for characterizing new old
stock NPN and PNP small signal germanium junction transistors and comparing
them to more modern silicon bipolar junction devices. The Early approach is
special in the sense that its two parameters, namely the Early voltage $V_a$
and a proportionality parameter $s$, are fixed and independent of transistor
operation. Remarkable results are obtained, including the fact that the four
considered groups, namely NPN and PNP germanium and silicon devices, occupy
mostly non-overlapping regions in the Early parameter space, with PNP devices
presenting larger parameter variability in both cases. Surprisingly, the
considered germanium devices exhibited smaller parameter variability than
observed for the silicon counterparts. When mapped into the more traditional
space defined by the current gain and output resistance parameters, the four
transistor groups exhibited much larger overlaps and yielded a clustering
structure much less organized than allowed by the Early mapping. This result
suggest that the Early representation of transistors is more compatible and
inherently related to the structure of amplifying devices such as those
considered in this work. In addition, it was verified that the center of mass
of each of the NPN-PNP pairs of germanium and silicon devices are crossed by
respective $\beta$-isolines for gains of 130 and 250, respectively. Germanium
devices were also characterized as having smaller output resistance and smaller
magnitudes of Early voltage.
| physics.app-ph | transistors have provided the basis of modern electronics being relatively intricate devices and often exhibiting intense parameter variation this type of electronic devices has motivated much research interest especially regarding their characterization and modeling in this work we apply a recently reported modeling methodology based on the early effect for characterizing new old stock npn and pnp small signal germanium junction transistors and comparing them to more modern silicon bipolar junction devices the early approach is special in the sense that its two parameters namely the early voltage v_a and a proportionality parameter s are fixed and independent of transistor operation remarkable results are obtained including the fact that the four considered groups namely npn and pnp germanium and silicon devices occupy mostly nonoverlapping regions in the early parameter space with pnp devices presenting larger parameter variability in both cases surprisingly the considered germanium devices exhibited smaller parameter variability than observed for the silicon counterparts when mapped into the more traditional space defined by the current gain and output resistance parameters the four transistor groups exhibited much larger overlaps and yielded a clustering structure much less organized than allowed by the early mapping this result suggest that the early representation of transistors is more compatible and inherently related to the structure of amplifying devices such as those considered in this work in addition it was verified that the center of mass of each of the npnpnp pairs of germanium and silicon devices are crossed by respective betaisolines for gains of 130 and 250 respectively germanium devices were also characterized as having smaller output resistance and smaller magnitudes of early voltage | [['transistors', 'have', 'provided', 'the', 'basis', 'of', 'modern', 'electronics', 'being', 'relatively', 'intricate', 'devices', 'and', 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1,802.01663 | Super Scatterers Based on Artificial Localized Magnon Resonances | The interaction between electromagnetic waves and objects is strongly
affected by the shape and material composition of the latter. Artificially
created materials, formed by a subwavelength structuring of their unit cells,
namely metamaterials, can exhibit peculiar responses to electromagnetic
radiation and provide additional powerful degrees of freedom to the scatterer
design. In particular, negative material susceptibilities give rise to strong
resonant interactions with deeply subwavelength particles. While the negative
electrical permittivity of natural noble metals manifests itself in localized
plasmon resonant oscillations, negative magnetic permeability is virtually
non-existent in nature. Here the concept of artificial magnon resonance in
subwavelength objects with effective negative permeability, designed based on
the metamaterial approach, is demonstrated. Strong localized oscillations of
the magnetic fields within an array of split ring resonators, forming a sphere,
hybridize in a collective mode of the structure. As a result, extremely high
scattering cross section, exceeding that of a steel sphere with the same radius
by four orders of magnitude, was demonstrated. Furthermore, the scattering
cross section of subwavelength metamaterial-based sphere was shown to be
comparable to the low frequency (MHz) radar signature of a big military
aircraft. Super scatterers, based on tunable resonances within artificially
created materials, can find use in a broad range of electromagnetic
applications, including wireless communications, radars, RFID, internet of
things hardware and many others.
| physics.class-ph physics.app-ph | the interaction between electromagnetic waves and objects is strongly affected by the shape and material composition of the latter artificially created materials formed by a subwavelength structuring of their unit cells namely metamaterials can exhibit peculiar responses to electromagnetic radiation and provide additional powerful degrees of freedom to the scatterer design in particular negative material susceptibilities give rise to strong resonant interactions with deeply subwavelength particles while the negative electrical permittivity of natural noble metals manifests itself in localized plasmon resonant oscillations negative magnetic permeability is virtually nonexistent in nature here the concept of artificial magnon resonance in subwavelength objects with effective negative permeability designed based on the metamaterial approach is demonstrated strong localized oscillations of the magnetic fields within an array of split ring resonators forming a sphere hybridize in a collective mode of the structure as a result extremely high scattering cross section exceeding that of a steel sphere with the same radius by four orders of magnitude was demonstrated furthermore the scattering cross section of subwavelength metamaterialbased sphere was shown to be comparable to the low frequency mhz radar signature of a big military aircraft super scatterers based on tunable resonances within artificially created materials can find use in a broad range of electromagnetic applications including wireless communications radars rfid internet of things hardware and many others | [['the', 'interaction', 'between', 'electromagnetic', 'waves', 'and', 'objects', 'is', 'strongly', 'affected', 'by', 'the', 'shape', 'and', 'material', 'composition', 'of', 'the', 'latter', 'artificially', 'created', 'materials', 'formed', 'by', 'a', 'subwavelength', 'structuring', 'of', 'their', 'unit', 'cells', 'namely', 'metamaterials', 'can', 'exhibit', 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1,802.01664 | Bistability of buoyancy-driven exchange flows in vertical tubes | Buoyancy-driven exchange flows are common to a variety of natural and
engineering systems ranging from persistently active volcanoes to counterflows
in oceanic straits. Experiments of exchange flows in closed vertical tubes have
been used as surrogates to elucidate the basic features of such flows. The
resulting data have historically been analyzed and interpreted through
core-annular flow solutions, the most common flow configuration at finite
viscosity contrasts. These models have been successful in fitting experimental
data, but less effective at explaining the variability observed in natural
systems. In this paper, we formulate a core-annular solution to the classical
problem of buoyancy-driven exchange flows in vertical tubes. The model posits
the existence of two mathematically valid solutions, i.e. thin- and thick-core
solutions. The theoretical existence of two solutions, however, does not
necessarily imply that the system is bistable in the sense that flow switching
may occur. Using direct numerical simulations, we test the hypothesis that
core-annular flow in vertical tubes is bistable, which implies that the
realized flow field is not uniquely defined by the material parameters of the
flow. Our numerical experiments, which fully predict experimental data without
fitting parameters, demonstrate that buoyancy-driven exchange flows are indeed
inherently bistable systems. This finding is consistent with previous
experimental data, but in contrast to the underlying hypothesis of previous
analytical models that the solution is unique and can be identified by
maximizing the flux or extremizing the dissipation in the system. These results
have important implications for data interpretation by analytical models, and
may also have relevant ramifications for understanding volcanic degassing.
| physics.flu-dyn | buoyancydriven exchange flows are common to a variety of natural and engineering systems ranging from persistently active volcanoes to counterflows in oceanic straits experiments of exchange flows in closed vertical tubes have been used as surrogates to elucidate the basic features of such flows the resulting data have historically been analyzed and interpreted through coreannular flow solutions the most common flow configuration at finite viscosity contrasts these models have been successful in fitting experimental data but less effective at explaining the variability observed in natural systems in this paper we formulate a coreannular solution to the classical problem of buoyancydriven exchange flows in vertical tubes the model posits the existence of two mathematically valid solutions ie thin and thickcore solutions the theoretical existence of two solutions however does not necessarily imply that the system is bistable in the sense that flow switching may occur using direct numerical simulations we test the hypothesis that coreannular flow in vertical tubes is bistable which implies that the realized flow field is not uniquely defined by the material parameters of the flow our numerical experiments which fully predict experimental data without fitting parameters demonstrate that buoyancydriven exchange flows are indeed inherently bistable systems this finding is consistent with previous experimental data but in contrast to the underlying hypothesis of previous analytical models that the solution is unique and can be identified by maximizing the flux or extremizing the dissipation in the system these results have important implications for data interpretation by analytical models and may also have relevant ramifications for understanding volcanic degassing | [['buoyancydriven', 'exchange', 'flows', 'are', 'common', 'to', 'a', 'variety', 'of', 'natural', 'and', 'engineering', 'systems', 'ranging', 'from', 'persistently', 'active', 'volcanoes', 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1,802.01665 | Particle Production in Ultra-Strong Coupling Waveguide QED | Understanding large-scale interacting quantum matter requires dealing with
the huge number of quanta that are produced by scattering even a few particles
against a complex quantum object. Prominent examples are found from high energy
cosmic ray showers to the optical or electrical driving of degenerate Fermi
gases. We tackle this challenge in the context of many-body quantum optics, as
motivated by the recent developments of circuit quantum electrodynamics at
ultrastrong coupling. The issue of particle production is addressed
quantitatively with a simple yet powerful concept rooted in the quantum
superposition principle. This key idea is illustrated by the study of
multi-photon emission from a single two-level artificial atom coupled to a high
impedance waveguide. We find surprisingly that the off-resonant inelastic
emission lineshape is dominated by broadband particle production, due to the
large phase space associated with contributions that do not conserve the number
of excitations. Such frequency conversion processes produce striking signatures
in time correlation measurements, which can be tested experimentally in quantum
waveguides. These ideas open new directions for the simulation of a variety of
physical systems, from polaron dynamics in solids to complex superconducting
quantum architectures.
| cond-mat.mes-hall quant-ph | understanding largescale interacting quantum matter requires dealing with the huge number of quanta that are produced by scattering even a few particles against a complex quantum object prominent examples are found from high energy cosmic ray showers to the optical or electrical driving of degenerate fermi gases we tackle this challenge in the context of manybody quantum optics as motivated by the recent developments of circuit quantum electrodynamics at ultrastrong coupling the issue of particle production is addressed quantitatively with a simple yet powerful concept rooted in the quantum superposition principle this key idea is illustrated by the study of multiphoton emission from a single twolevel artificial atom coupled to a high impedance waveguide we find surprisingly that the offresonant inelastic emission lineshape is dominated by broadband particle production due to the large phase space associated with contributions that do not conserve the number of excitations such frequency conversion processes produce striking signatures in time correlation measurements which can be tested experimentally in quantum waveguides these ideas open new directions for the simulation of a variety of physical systems from polaron dynamics in solids to complex superconducting quantum architectures | [['understanding', 'largescale', 'interacting', 'quantum', 'matter', 'requires', 'dealing', 'with', 'the', 'huge', 'number', 'of', 'quanta', 'that', 'are', 'produced', 'by', 'scattering', 'even', 'a', 'few', 'particles', 'against', 'a', 'complex', 'quantum', 'object', 'prominent', 'examples', 'are', 'found', 'from', 'high', 'energy', 'cosmic', 'ray', 'showers', 'to', 'the', 'optical', 'or', 'electrical', 'driving', 'of', 'degenerate', 'fermi', 'gases', 'we', 'tackle', 'this', 'challenge', 'in', 'the', 'context', 'of', 'manybody', 'quantum', 'optics', 'as', 'motivated', 'by', 'the', 'recent', 'developments', 'of', 'circuit', 'quantum', 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1,802.01666 | Adviser Networks: Learning What Question to Ask for Human-In-The-Loop
Viewpoint Estimation | Humans have an unparalleled visual intelligence and can overcome visual
ambiguities that machines currently cannot. Recent works have shown that
incorporating guidance from humans during inference for monocular
viewpoint-estimation can help overcome difficult cases in which the
computer-alone would have otherwise failed. These hybrid intelligence
approaches are hence gaining traction. However, deciding what question to ask
the human at inference time remains an unknown for these problems.
We address this question by formulating it as an Adviser Problem: can we
learn a mapping from the input to a specific question to ask the human to
maximize the expected positive impact to the overall task? We formulate a
solution to the adviser problem for viewpoint estimation using a deep network
where the question asks for the location of a keypoint in the input image. We
show that by using the Adviser Network's recommendations, the model and the
human outperforms the previous hybrid-intelligence state-of-the-art by 3.7%,
and the computer-only state-of-the-art by 5.28% absolute.
| cs.CV | humans have an unparalleled visual intelligence and can overcome visual ambiguities that machines currently cannot recent works have shown that incorporating guidance from humans during inference for monocular viewpointestimation can help overcome difficult cases in which the computeralone would have otherwise failed these hybrid intelligence approaches are hence gaining traction however deciding what question to ask the human at inference time remains an unknown for these problems we address this question by formulating it as an adviser problem can we learn a mapping from the input to a specific question to ask the human to maximize the expected positive impact to the overall task we formulate a solution to the adviser problem for viewpoint estimation using a deep network where the question asks for the location of a keypoint in the input image we show that by using the adviser networks recommendations the model and the human outperforms the previous hybridintelligence stateoftheart by 37 and the computeronly stateoftheart by 528 absolute | [['humans', 'have', 'an', 'unparalleled', 'visual', 'intelligence', 'and', 'can', 'overcome', 'visual', 'ambiguities', 'that', 'machines', 'currently', 'can', 'not', 'recent', 'works', 'have', 'shown', 'that', 'incorporating', 'guidance', 'from', 'humans', 'during', 'inference', 'for', 'monocular', 'viewpointestimation', 'can', 'help', 'overcome', 'difficult', 'cases', 'in', 'which', 'the', 'computeralone', 'would', 'have', 'otherwise', 'failed', 'these', 'hybrid', 'intelligence', 'approaches', 'are', 'hence', 'gaining', 'traction', 'however', 'deciding', 'what', 'question', 'to', 'ask', 'the', 'human', 'at', 'inference', 'time', 'remains', 'an', 'unknown', 'for', 'these', 'problems', 'we', 'address', 'this', 'question', 'by', 'formulating', 'it', 'as', 'an', 'adviser', 'problem', 'can', 'we', 'learn', 'a', 'mapping', 'from', 'the', 'input', 'to', 'a', 'specific', 'question', 'to', 'ask', 'the', 'human', 'to', 'maximize', 'the', 'expected', 'positive', 'impact', 'to', 'the', 'overall', 'task', 'we', 'formulate', 'a', 'solution', 'to', 'the', 'adviser', 'problem', 'for', 'viewpoint', 'estimation', 'using', 'a', 'deep', 'network', 'where', 'the', 'question', 'asks', 'for', 'the', 'location', 'of', 'a', 'keypoint', 'in', 'the', 'input', 'image', 'we', 'show', 'that', 'by', 'using', 'the', 'adviser', 'networks', 'recommendations', 'the', 'model', 'and', 'the', 'human', 'outperforms', 'the', 'previous', 'hybridintelligence', 'stateoftheart', 'by', '37', 'and', 'the', 'computeronly', 'stateoftheart', 'by', '528', 'absolute']] | [-0.03305257585627628, 0.033591246326241046, -0.061163181860495026, 0.08797961565510434, -0.14424713578699982, -0.16747108477615763, 0.06269583692538398, 0.4208388256050552, -0.3057567394939782, -0.3792167553866777, 0.09938315889662533, -0.26421641523042055, -0.21020286520825157, 0.18958762834361412, -0.194310772875206, 0.1062795709217368, 0.11508278610314467, 0.0741315357257388, -0.03188188779727803, -0.2760466611059972, 0.30168860873997305, 0.059494278280033515, 0.27857448747735236, 0.06696264549229247, 0.12893970965855767, -0.020582139828018372, -0.017013856571586213, 0.009925699440689733, -0.10124336984932321, 0.15720630912964903, 0.34092646614719135, 0.23121248778026504, 0.3754123361350945, -0.43189217895269394, -0.23945368830515426, 0.1326021790958328, 0.17557069308808237, 0.11924345397811878, -0.006038239579412002, -0.3197008297436788, 0.0966777283634955, -0.12905993834255805, -0.02792985760312103, -0.09564551969259223, 0.010650104943285638, -0.06695909647615862, -0.2691376190897832, -0.00837163926880288, 0.07142903302690085, 0.042524788080702855, -0.07978613275439254, -0.0989802582484163, 0.06573141763529068, 0.22426191780751548, 0.042222242312405636, 0.08375683618647553, 0.11505859733346992, -0.22121223685761937, -0.16852254841382366, 0.3897886700173722, -0.013587804605500608, -0.22089422424029134, 0.19150252268013038, -0.04721260728031586, -0.1354079317460662, 0.08491734019775368, 0.1785090699603286, 0.08610143209512852, -0.1670356322436511, 0.027755988625105164, -0.07264629875521965, 0.18077367894525367, 0.05851570190935502, -0.03390314263775002, 0.22635015659328975, 0.18732403834126418, 0.05274999006931328, 0.0868583865864556, -0.07847527348542516, -0.03639773750100049, -0.1609768686061607, -0.09751100611248159, -0.16781700839424105, 0.03127747415898359, -0.043812061998646123, -0.09748297222457823, 0.35259045545111967, 0.27289379624028387, 0.20391906000956705, 0.08779627208883839, 0.32639269109320224, 0.08035905168117673, 0.06090326812943515, 0.07800790953377698, 0.2277526048342167, -0.014947518705216508, 0.12775746783642453, -0.20380064357909125, 0.120671343349386, 0.031604770786140726] |
1,802.01667 | Passband reconstruction from photometry | Based on an initial expectation from laboratory measurements or instrument
simulations, photometric passbands are usually subject to refinements. These
refinements use photometric observations of astronomical sources with known
spectral energy distribution. This work investigates the methods for and
limitations in determining passbands from photometric observations. A simple
general formalism for passband determinations from photometric measurements is
derived. The results are applied to the passbands of HIPPARCOS, Tycho, and Gaia
DR1. The problem of passband determination is formulated in a basic functional
analytic framework. For the solution of the resulting equations, functional
principal component analysis is applied. We find that, given a set of
calibration sources, the passband can be described with respect to the set of
calibration sources as the sum of two functions, one which is uniquely
determined by the set of calibration sources, and one which is entirely
unconstrained. The constrained components for the HIPPARCOS, Tycho, and Gaia
DR1 passbands are determined, and the unconstrained components are estimated.
| astro-ph.IM | based on an initial expectation from laboratory measurements or instrument simulations photometric passbands are usually subject to refinements these refinements use photometric observations of astronomical sources with known spectral energy distribution this work investigates the methods for and limitations in determining passbands from photometric observations a simple general formalism for passband determinations from photometric measurements is derived the results are applied to the passbands of hipparcos tycho and gaia dr1 the problem of passband determination is formulated in a basic functional analytic framework for the solution of the resulting equations functional principal component analysis is applied we find that given a set of calibration sources the passband can be described with respect to the set of calibration sources as the sum of two functions one which is uniquely determined by the set of calibration sources and one which is entirely unconstrained the constrained components for the hipparcos tycho and gaia dr1 passbands are determined and the unconstrained components are estimated | [['based', 'on', 'an', 'initial', 'expectation', 'from', 'laboratory', 'measurements', 'or', 'instrument', 'simulations', 'photometric', 'passbands', 'are', 'usually', 'subject', 'to', 'refinements', 'these', 'refinements', 'use', 'photometric', 'observations', 'of', 'astronomical', 'sources', 'with', 'known', 'spectral', 'energy', 'distribution', 'this', 'work', 'investigates', 'the', 'methods', 'for', 'and', 'limitations', 'in', 'determining', 'passbands', 'from', 'photometric', 'observations', 'a', 'simple', 'general', 'formalism', 'for', 'passband', 'determinations', 'from', 'photometric', 'measurements', 'is', 'derived', 'the', 'results', 'are', 'applied', 'to', 'the', 'passbands', 'of', 'hipparcos', 'tycho', 'and', 'gaia', 'dr1', 'the', 'problem', 'of', 'passband', 'determination', 'is', 'formulated', 'in', 'a', 'basic', 'functional', 'analytic', 'framework', 'for', 'the', 'solution', 'of', 'the', 'resulting', 'equations', 'functional', 'principal', 'component', 'analysis', 'is', 'applied', 'we', 'find', 'that', 'given', 'a', 'set', 'of', 'calibration', 'sources', 'the', 'passband', 'can', 'be', 'described', 'with', 'respect', 'to', 'the', 'set', 'of', 'calibration', 'sources', 'as', 'the', 'sum', 'of', 'two', 'functions', 'one', 'which', 'is', 'uniquely', 'determined', 'by', 'the', 'set', 'of', 'calibration', 'sources', 'and', 'one', 'which', 'is', 'entirely', 'unconstrained', 'the', 'constrained', 'components', 'for', 'the', 'hipparcos', 'tycho', 'and', 'gaia', 'dr1', 'passbands', 'are', 'determined', 'and', 'the', 'unconstrained', 'components', 'are', 'estimated']] | [-0.03859559575212188, 0.06699585989636034, -0.08008930254145526, 0.0426299234299222, -0.11407418865710497, -0.0729410549160093, 0.04685047307866626, 0.41260495809838177, -0.2470024442569411, -0.3458823592740373, 0.14021231543010798, -0.3159855417557992, -0.05179018833732698, 0.23797627404128435, -0.09919476332433988, 0.056625709982472475, 0.15822902197267014, -0.061895509154419416, -0.06008124206709908, -0.2452175116573926, 0.2875572929231566, 0.026013933253125288, 0.2039206787594594, -0.07505431291065179, 0.10705846642958931, -0.0358687604413717, -0.15366762672783807, 0.045574799086898564, -0.16081837948318026, 0.10360145408703829, 0.25893380158231594, 0.17095369491089513, 0.19999646745272912, -0.31367862392798995, -0.20003115864092252, 0.03888813053854392, 0.12539808041183279, 0.0402171751466085, 0.03756144454455353, -0.2741401640814729, 0.06539792307594325, -0.11711016482440754, -0.15476765152998267, -0.022537791129434482, 0.002714147401275113, 0.06155386706523132, -0.3014197001932189, 0.05426281693944475, -0.04289305289858021, 0.13980301828705705, -0.17973533596814378, -0.1576205536890484, -0.012696152880380396, 0.12811826814941013, 0.008246811616118066, 0.07008785293837719, 0.09493583583753207, -0.10090745265042642, -0.048283116636594056, 0.4365434197417926, -0.050354513461934404, -0.13863052043707286, 0.12849388769827783, -0.1141733831493184, -0.1493928149866406, 0.07255718885935494, 0.11755947688070592, 0.10451200678362511, -0.24941253990400583, 0.04069637582692849, 0.019387621775968, 0.16525720423378515, 0.04986958552035503, 0.06542561472342641, 0.2314267242909409, 0.08359860156633658, 0.05305455294937929, 0.07879933554431773, -0.2068010702423635, -0.027360649631009436, -0.34502249569050036, -0.06306609975565607, -0.18457764889462852, 0.03407197052511037, -0.10454777766963161, -0.16298092009237736, 0.3906549046514556, 0.15731404118268982, 0.13421062392008026, 0.03228932325873757, 0.3629600745742209, 0.14454528392698193, 0.07572217893612106, 0.05264369322976563, 0.3056409010154312, 0.1595464255020488, 0.0550731721392367, -0.16522010013723049, 0.0643902717391029, 0.046846282287151556] |
1,802.01668 | Event plane dependence of the flow modulated background in di-hadron and
jet-hadron correlations in heavy ion collisions | Di-hadron and jet-hadron correlations are commonly used in relativistic heavy
ion collisions to study the soft component of jets in a quark gluon plasma.
There is a large correlated background which is described by the Fourier
decomposition of the azimuthal anisotropy where $v_n$ is the $n$th order
coefficient. The path length dependence of partonic energy loss can be studied
by varying the angle of the high momentum trigger particle or jet relative to a
reconstructed event plane. This modifies the shape of the background correlated
with that event plane. The original derivation of the shape of this background
only considered correlations relative to the second order event plane, which is
correlated to the initial participant plane. We derive the shape of this
background for an event plane at an arbitrary order. There is a phase shift in
the case of jets restricted to asymmetric regions relative to the event plane.
For realistic correlations between event planes, the correlation between the
second and fourth order event planes leads to a much smaller effect than the
finite event plane resolution at each order. Finally, we assess the status of
the rapidity even $v_1$ term due to flow, which has been measured to be
comparable to $v_2$ and $v_3$ terms.
| nucl-ex | dihadron and jethadron correlations are commonly used in relativistic heavy ion collisions to study the soft component of jets in a quark gluon plasma there is a large correlated background which is described by the fourier decomposition of the azimuthal anisotropy where v_n is the nth order coefficient the path length dependence of partonic energy loss can be studied by varying the angle of the high momentum trigger particle or jet relative to a reconstructed event plane this modifies the shape of the background correlated with that event plane the original derivation of the shape of this background only considered correlations relative to the second order event plane which is correlated to the initial participant plane we derive the shape of this background for an event plane at an arbitrary order there is a phase shift in the case of jets restricted to asymmetric regions relative to the event plane for realistic correlations between event planes the correlation between the second and fourth order event planes leads to a much smaller effect than the finite event plane resolution at each order finally we assess the status of the rapidity even v_1 term due to flow which has been measured to be comparable to v_2 and v_3 terms | [['dihadron', 'and', 'jethadron', 'correlations', 'are', 'commonly', 'used', 'in', 'relativistic', 'heavy', 'ion', 'collisions', 'to', 'study', 'the', 'soft', 'component', 'of', 'jets', 'in', 'a', 'quark', 'gluon', 'plasma', 'there', 'is', 'a', 'large', 'correlated', 'background', 'which', 'is', 'described', 'by', 'the', 'fourier', 'decomposition', 'of', 'the', 'azimuthal', 'anisotropy', 'where', 'v_n', 'is', 'the', 'nth', 'order', 'coefficient', 'the', 'path', 'length', 'dependence', 'of', 'partonic', 'energy', 'loss', 'can', 'be', 'studied', 'by', 'varying', 'the', 'angle', 'of', 'the', 'high', 'momentum', 'trigger', 'particle', 'or', 'jet', 'relative', 'to', 'a', 'reconstructed', 'event', 'plane', 'this', 'modifies', 'the', 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1,802.01669 | Wannier-function-based constrained DFT with nonorthogonality-correcting
Pulay forces in application to the reorganization effects in
graphene-adsorbed pentacene | Pulay terms arise in the Hellman-Feynman forces in electronic structure
calculations when one employs a basis set made of localized orbitals that move
with their host atoms. If the total energy of the system depends on a subspace
population defined in terms of the localized orbitals across multiple atoms,
then unconventional Pulay terms will emerge due to the variation of the orbital
nonorthogonality with ionic translation. Here, we derive the required exact
expressions for such terms, which cannot be eliminated by orbital
orthonormalization. We have implemented these corrected ionic forces within the
linear-scaling density functional theory (DFT) package ONETEP, and have used
constrained DFT to calculate the reorganization energy of a pentacene molecule
adsorbed on a graphene flake. The calculations are performed by including
ensemble DFT, corrections for periodic boundary conditions, and empirical Van
der Waals interactions. For this system we find that tensorially invariant
population analysis yields an adsorbate subspace population that is very close
to integer-valued when based upon nonorthogonal Wannier functions, and also but
less precisely when using pseudoatomic functions. Thus, orbitals can provide a
very effective population analysis for constrained DFT. Our calculations show
that the reorganization energy of the adsorbed pentacene is typically lower
than that of pentacene in the gas phase. We attribute this effect to steric
hindrance.
| cond-mat.mtrl-sci cond-mat.mes-hall physics.comp-ph quant-ph | pulay terms arise in the hellmanfeynman forces in electronic structure calculations when one employs a basis set made of localized orbitals that move with their host atoms if the total energy of the system depends on a subspace population defined in terms of the localized orbitals across multiple atoms then unconventional pulay terms will emerge due to the variation of the orbital nonorthogonality with ionic translation here we derive the required exact expressions for such terms which cannot be eliminated by orbital orthonormalization we have implemented these corrected ionic forces within the linearscaling density functional theory dft package onetep and have used constrained dft to calculate the reorganization energy of a pentacene molecule adsorbed on a graphene flake the calculations are performed by including ensemble dft corrections for periodic boundary conditions and empirical van der waals interactions for this system we find that tensorially invariant population analysis yields an adsorbate subspace population that is very close to integervalued when based upon nonorthogonal wannier functions and also but less precisely when using pseudoatomic functions thus orbitals can provide a very effective population analysis for constrained dft our calculations show that the reorganization energy of the adsorbed pentacene is typically lower than that of pentacene in the gas phase we attribute this effect to steric hindrance | [['pulay', 'terms', 'arise', 'in', 'the', 'hellmanfeynman', 'forces', 'in', 'electronic', 'structure', 'calculations', 'when', 'one', 'employs', 'a', 'basis', 'set', 'made', 'of', 'localized', 'orbitals', 'that', 'move', 'with', 'their', 'host', 'atoms', 'if', 'the', 'total', 'energy', 'of', 'the', 'system', 'depends', 'on', 'a', 'subspace', 'population', 'defined', 'in', 'terms', 'of', 'the', 'localized', 'orbitals', 'across', 'multiple', 'atoms', 'then', 'unconventional', 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1,802.0167 | The empirical Gaia G-band extinction coefficient | The first Gaia data release unlocked the access to the photometric
information of 1.1 billion sources in the $G$-band. Yet, given the high level
of degeneracy between extinction and spectral energy distribution for large
passbands such as the Gaia $G$-band, a correction for the interstellar
reddening is needed in order to exploit Gaia data. The purpose of this
manuscript is to provide the empirical estimation of the Gaia $G$-band
extinction coefficient $k_G$ for both the red giants and main sequence stars,
in order to be able to exploit the first data release DR1. We selected two
samples of single stars: one for the red giants and one for the main sequence.
Both samples are the result of a cross-match between Gaia DR1 and 2MASS
catalogues; they consist of high quality photometry in the $G$-, $J$- and
$Ks$-bands. These samples were complemented by temperature and metallicity
information retrieved from, respectively, APOGEE DR13 and LAMOST DR2 surveys.
We implemented a Markov Chain Monte Carlo method where we used $(G-Ks)_0$ vs
$T_\mathrm{eff}$ and $(J-Ks)_0$ vs $(G-Ks)_0$ calibration relations to estimate
the extinction coefficient $k_G$ and we quantify its corresponding confidence
interval via bootstrap resampling method. We tested our method on samples of
red giants and main sequence stars, finding consistent solutions. We present
here the determination of the Gaia extinction coefficient through a completely
empirical method. Furthermore we provide the scientific community a formula for
measuring the extinction coefficient as a function of stellar effective
temperature, the intrinsic colour $(G-Ks)_0$ and absorption.
| astro-ph.SR astro-ph.GA | the first gaia data release unlocked the access to the photometric information of 11 billion sources in the gband yet given the high level of degeneracy between extinction and spectral energy distribution for large passbands such as the gaia gband a correction for the interstellar reddening is needed in order to exploit gaia data the purpose of this manuscript is to provide the empirical estimation of the gaia gband extinction coefficient k_g for both the red giants and main sequence stars in order to be able to exploit the first data release dr1 we selected two samples of single stars one for the red giants and one for the main sequence both samples are the result of a crossmatch between gaia dr1 and 2mass catalogues they consist of high quality photometry in the g j and ksbands these samples were complemented by temperature and metallicity information retrieved from respectively apogee dr13 and lamost dr2 surveys we implemented a markov chain monte carlo method where we used gks_0 vs t_mathrmeff and jks_0 vs gks_0 calibration relations to estimate the extinction coefficient k_g and we quantify its corresponding confidence interval via bootstrap resampling method we tested our method on samples of red giants and main sequence stars finding consistent solutions we present here the determination of the gaia extinction coefficient through a completely empirical method furthermore we provide the scientific community a formula for measuring the extinction coefficient as a function of stellar effective temperature the intrinsic colour gks_0 and absorption | [['the', 'first', 'gaia', 'data', 'release', 'unlocked', 'the', 'access', 'to', 'the', 'photometric', 'information', 'of', '11', 'billion', 'sources', 'in', 'the', 'gband', 'yet', 'given', 'the', 'high', 'level', 'of', 'degeneracy', 'between', 'extinction', 'and', 'spectral', 'energy', 'distribution', 'for', 'large', 'passbands', 'such', 'as', 'the', 'gaia', 'gband', 'a', 'correction', 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1,802.01671 | Beating Effects of Vector Solitons in Bose-Einstein Condensate | We study the beating effects of solitons in multi-component coupled
Bose-Einstein condensate systems. Our analysis indicate that the period of
beating behavior is determined by the energy eigenvalue difference in the
effective quantum well induced by solitons, and the beating pattern is
determined by the eigen-states of quantum well which are involved in the
beating behavior. We show that the beating solitons correspond to linear
superpositions of eigen-states in some quantum wells, and the correspondence
relations are identical for solitons in both attractive interaction and
repulsive interaction condensate. This provides a possible way to understand
the beating effects of solitons for attractive and repulsive interaction cases
in a unified way, based on the knowledge of quantum eigen-states. Moreover, our
results demonstrate many different beating patterns for solitons in
three-component coupled condensate, in sharp contrast to the beating dark
soliton reported before. The beating behavior can be used to test the
eigenvalue differences of some certain quantum wells, and more abundant beating
patterns are expected to exist in more components coupled systems.
| cond-mat.quant-gas nlin.PS | we study the beating effects of solitons in multicomponent coupled boseeinstein condensate systems our analysis indicate that the period of beating behavior is determined by the energy eigenvalue difference in the effective quantum well induced by solitons and the beating pattern is determined by the eigenstates of quantum well which are involved in the beating behavior we show that the beating solitons correspond to linear superpositions of eigenstates in some quantum wells and the correspondence relations are identical for solitons in both attractive interaction and repulsive interaction condensate this provides a possible way to understand the beating effects of solitons for attractive and repulsive interaction cases in a unified way based on the knowledge of quantum eigenstates moreover our results demonstrate many different beating patterns for solitons in threecomponent coupled condensate in sharp contrast to the beating dark soliton reported before the beating behavior can be used to test the eigenvalue differences of some certain quantum wells and more abundant beating patterns are expected to exist in more components coupled systems | [['we', 'study', 'the', 'beating', 'effects', 'of', 'solitons', 'in', 'multicomponent', 'coupled', 'boseeinstein', 'condensate', 'systems', 'our', 'analysis', 'indicate', 'that', 'the', 'period', 'of', 'beating', 'behavior', 'is', 'determined', 'by', 'the', 'energy', 'eigenvalue', 'difference', 'in', 'the', 'effective', 'quantum', 'well', 'induced', 'by', 'solitons', 'and', 'the', 'beating', 'pattern', 'is', 'determined', 'by', 'the', 'eigenstates', 'of', 'quantum', 'well', 'which', 'are', 'involved', 'in', 'the', 'beating', 'behavior', 'we', 'show', 'that', 'the', 'beating', 'solitons', 'correspond', 'to', 'linear', 'superpositions', 'of', 'eigenstates', 'in', 'some', 'quantum', 'wells', 'and', 'the', 'correspondence', 'relations', 'are', 'identical', 'for', 'solitons', 'in', 'both', 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1,802.01672 | Entrance and exit at infinity for stable jump diffusions | In his seminal work from the 1950s, William Feller classified all
one-dimensional diffusions on $-\infty\leq a<b\leq \infty$ in terms of their
ability to access the boundary (Feller's test for explosions) and to enter the
interior from the boundary. Feller's technique is restricted to diffusion
processes as the corresponding differential generators allow explicit
computations and the use of Hille-Yosida theory. In the present article we
study exit and entrance from infinity for the most natural generalization, that
is, jump diffusions of the form \[
dZ_t=\sigma(Z_{t-})\,dX_t, \] driven by stable L\'evy processes for
$\alpha\in (0,2)$. Many results have been proved for jump diffusions, employing
a variety of techniques developed after Feller's work but exit and entrance
from infinite boundaries has long remained open. We show that the presence of
jumps implies features not seen in the diffusive setting without drift. Finite
time explosion is possible for $\alpha\in (0,1)$, whereas entrance from
different kinds of infinity is possible for $\alpha\in [1,2)$. We derive
necessary and sufficient conditions on $\sigma$ so that (i) non-exploding
solutions exist and (ii) the corresponding transition semigroup extends to an
entrance point at `infinity'.
Our proofs are based on very recent developments for path transformations of
stable processes via the Lamperti-Kiu representation and new Wiener-Hopf
factorisations for L\'evy processes that lie therein. The arguments draw
together original and intricate applications of results using the
Riesz-Bogdan--\.Zak transformation, entrance laws for self-similar Markov
processes, perpetual integrals of L\'evy processes and fluctuation theory,
which have not been used before in the SDE setting, thereby allowing us to
employ classical theory such as Hunt-Nagasawa duality and Getoor's
characterisation of transience and recurrence.
| math.PR | in his seminal work from the 1950s william feller classified all onedimensional diffusions on inftyleq ableq infty in terms of their ability to access the boundary fellers test for explosions and to enter the interior from the boundary fellers technique is restricted to diffusion processes as the corresponding differential generators allow explicit computations and the use of hilleyosida theory in the present article we study exit and entrance from infinity for the most natural generalization that is jump diffusions of the form dz_tsigmaz_tdx_t driven by stable levy processes for alphain 02 many results have been proved for jump diffusions employing a variety of techniques developed after fellers work but exit and entrance from infinite boundaries has long remained open we show that the presence of jumps implies features not seen in the diffusive setting without drift finite time explosion is possible for alphain 01 whereas entrance from different kinds of infinity is possible for alphain 12 we derive necessary and sufficient conditions on sigma so that i nonexploding solutions exist and ii the corresponding transition semigroup extends to an entrance point at infinity our proofs are based on very recent developments for path transformations of stable processes via the lampertikiu representation and new wienerhopf factorisations for levy processes that lie therein the arguments draw together original and intricate applications of results using the rieszbogdanzak transformation entrance laws for selfsimilar markov processes perpetual integrals of levy processes and fluctuation theory which have not been used before in the sde setting thereby allowing us to employ classical theory such as huntnagasawa duality and getoors characterisation of transience and recurrence | [['in', 'his', 'seminal', 'work', 'from', 'the', '1950s', 'william', 'feller', 'classified', 'all', 'onedimensional', 'diffusions', 'on', 'inftyleq', 'ableq', 'infty', 'in', 'terms', 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1,802.01673 | The THESEUS Workshop 2017 | The Transient High-Energy Sky and Early Universe Surveyor (THESEUS) is a
mission concept developed in the last years by a large European consortium,
with interest in prospective participation by research groups in USA and other
non-European countries. As detailed in Amati et al. 2017 (arXiv:1710.04638) and
Stratta et al. 2017 (arXiv:1712.08153), THESEUS aims at exploiting
high-redshift Gamma-Ray Bursts for getting unique clues on the early Universe
and, being an unprecedentedly powerful machine for the detection, accurate
location and redshift determination of all types of GRBs (long, short, high-z,
under-luminous, ultra-long) and many other classes of transient sources and
phenomena, at providing a substantial contribution to multi-messenger
astrophysics and time-domain astronomy. Under these respects, THESEUS will show
a beautiful synergy with the large observing facilities of the future, like
E-ELT, TMT, SKA, CTA, ATHENA, in the electromagnetic domain, as well as with
next-generation gravitational-waves and neutrino detectors, thus enhancing
importantly their scientific return. Moreover, it will also operate as a
flexible IR and X-ray observatory, thus providing an even larger involvement of
the scientific community, as is currently the case for the Swift mission. In
order to further explore the magnificent prospective science of the mission,
the THESEUS consortium organized a Workshop in Naples on October 5-6 2017. The
programme included about 50 reviews and talks from worldwide recognized experts
of the fields. The topics ranged from the description of the mission concept,
instrumentation and technologies to the main, additional and observatory
science, further showing the strong impact that THESEUS observations would have
on several fields of astrophysics, cosmology and fundamental physics.
| astro-ph.HE | the transient highenergy sky and early universe surveyor theseus is a mission concept developed in the last years by a large european consortium with interest in prospective participation by research groups in usa and other noneuropean countries as detailed in amati et al 2017 arxiv171004638 and stratta et al 2017 arxiv171208153 theseus aims at exploiting highredshift gammaray bursts for getting unique clues on the early universe and being an unprecedentedly powerful machine for the detection accurate location and redshift determination of all types of grbs long short highz underluminous ultralong and many other classes of transient sources and phenomena at providing a substantial contribution to multimessenger astrophysics and timedomain astronomy under these respects theseus will show a beautiful synergy with the large observing facilities of the future like eelt tmt ska cta athena in the electromagnetic domain as well as with nextgeneration gravitationalwaves and neutrino detectors thus enhancing importantly their scientific return moreover it will also operate as a flexible ir and xray observatory thus providing an even larger involvement of the scientific community as is currently the case for the swift mission in order to further explore the magnificent prospective science of the mission the theseus consortium organized a workshop in naples on october 56 2017 the programme included about 50 reviews and talks from worldwide recognized experts of the fields the topics ranged from the description of the mission concept instrumentation and technologies to the main additional and observatory science further showing the strong impact that theseus observations would have on several fields of astrophysics cosmology and fundamental physics | [['the', 'transient', 'highenergy', 'sky', 'and', 'early', 'universe', 'surveyor', 'theseus', 'is', 'a', 'mission', 'concept', 'developed', 'in', 'the', 'last', 'years', 'by', 'a', 'large', 'european', 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1,802.01674 | The X-Gamma Imaging Spectrometer (XGIS) onboard THESEUS | A compact and modular X and gamma-ray imaging spectrometer (XGIS) has been
designed as one of the instruments foreseen on-board the THESEUS mission
proposed in response to the ESA M5 call. The experiment envisages the use of
CsI scintillator bars read out at both ends by single-cell 25 mm 2 Silicon
Drift Detectors. Events absorbed in the Silicon layer (lower energy X rays) and
events absorbed in the scintillator crystal (higher energy X rays and
Gamma-rays) are discriminated using the on-board electronics. A coded mask
provides imaging capabilities at low energies, thus allowing a compact and
sensitive instrument in a wide energy band (~2 keV up to ~20 MeV). The
instrument design, expected performance and the characterization performed on a
series of laboratory prototypes are discussed.
| astro-ph.IM | a compact and modular x and gammaray imaging spectrometer xgis has been designed as one of the instruments foreseen onboard the theseus mission proposed in response to the esa m5 call the experiment envisages the use of csi scintillator bars read out at both ends by singlecell 25 mm 2 silicon drift detectors events absorbed in the silicon layer lower energy x rays and events absorbed in the scintillator crystal higher energy x rays and gammarays are discriminated using the onboard electronics a coded mask provides imaging capabilities at low energies thus allowing a compact and sensitive instrument in a wide energy band 2 kev up to 20 mev the instrument design expected performance and the characterization performed on a series of laboratory prototypes are discussed | [['a', 'compact', 'and', 'modular', 'x', 'and', 'gammaray', 'imaging', 'spectrometer', 'xgis', 'has', 'been', 'designed', 'as', 'one', 'of', 'the', 'instruments', 'foreseen', 'onboard', 'the', 'theseus', 'mission', 'proposed', 'in', 'response', 'to', 'the', 'esa', 'm5', 'call', 'the', 'experiment', 'envisages', 'the', 'use', 'of', 'csi', 'scintillator', 'bars', 'read', 'out', 'at', 'both', 'ends', 'by', 'singlecell', '25', 'mm', '2', 'silicon', 'drift', 'detectors', 'events', 'absorbed', 'in', 'the', 'silicon', 'layer', 'lower', 'energy', 'x', 'rays', 'and', 'events', 'absorbed', 'in', 'the', 'scintillator', 'crystal', 'higher', 'energy', 'x', 'rays', 'and', 'gammarays', 'are', 'discriminated', 'using', 'the', 'onboard', 'electronics', 'a', 'coded', 'mask', 'provides', 'imaging', 'capabilities', 'at', 'low', 'energies', 'thus', 'allowing', 'a', 'compact', 'and', 'sensitive', 'instrument', 'in', 'a', 'wide', 'energy', 'band', '2', 'kev', 'up', 'to', '20', 'mev', 'the', 'instrument', 'design', 'expected', 'performance', 'and', 'the', 'characterization', 'performed', 'on', 'a', 'series', 'of', 'laboratory', 'prototypes', 'are', 'discussed']] | [-0.09653371297568082, 0.17424753701128065, -0.04492403609678149, 0.0708986812569201, -0.042238989097299055, -0.1601664466187358, 0.028639122270047664, 0.4378200671523809, -0.18856536531075835, -0.392849800914526, 0.08369363230839372, -0.3609248731285334, -0.011536535486578941, 0.23850826225802302, -0.037031709916889664, 0.05720873403549194, 0.08151927245408297, -0.049673798708245155, -0.05933538080565631, -0.20932214818149805, 0.1637743671219796, 0.25104341161996124, 0.27845113791525367, -0.006635315105319023, 0.18093900017812847, -0.03499895785190165, -0.04631475105881691, -0.058237610142678024, -0.107503732804209, 0.08047017017006874, 0.34662063577584923, 0.0693514234998729, 0.18770002719853074, -0.43039140506088736, -0.19512905500084163, 0.041805658007855524, 0.0679873211607337, -0.12137257815152407, -0.06826236667204648, -0.31485382753610613, 0.051202435463666915, -0.17960473143868147, -0.1306357407718897, 0.026404488299041986, -0.03804121976345778, 0.010679260723292828, -0.1868026064634323, -0.04445863793417811, -0.033726319894194605, 0.03797585764527321, -0.09461720406264067, -0.119234171400778, 0.011237726559862495, 0.06316734179481864, -0.040528118088841436, 0.05143536498676986, 0.19613149955123663, -0.08861844761669636, -0.06505030994396657, 0.32889455642551185, -0.04137878032308072, -0.08199449187517166, 0.152588225254789, -0.21099915855750442, -0.10878429981321096, 0.2689636983498931, 0.1798408205281012, 0.07856625540554524, -0.17711242202669383, 0.08560650711436756, 0.0897809938620776, 0.23774555277079343, 0.09575207057408988, 0.07125459093600511, 0.24711350082047284, 0.25485446812212464, 0.0754321779073216, 0.11501199325080962, -0.2656226557586342, 0.0649783486649394, -0.2924125587940216, -0.176886569484137, -0.14950203042663635, 0.0635345914568752, -0.03353791281883605, -0.06339005132205784, 0.36854068049043415, 0.07142706794664264, 0.10241548503842204, -0.03201384435221553, 0.31857546216249466, -0.005440371624194086, 0.1140120803178288, 0.0062733855079859496, 0.3029592253100127, 0.09640245379693806, 0.1610668338946998, -0.14091159645095466, -0.0026062661483883857, -0.017347828436642884] |
1,802.01675 | The Soft X-ray Imager (SXI) on-board the THESEUS mission | We summarize in this contribution the capabilities, design status, and the
en- abling technologies of the Soft X-ray Imager (SXI) planned to be on-board
the THESEUS mission. We describe its central role in making THESEUS a powerful
machine to probe the physical conditions of the early Universe (close to the
reionization era) and to explore the time-domain Universe.
| astro-ph.IM | we summarize in this contribution the capabilities design status and the en abling technologies of the soft xray imager sxi planned to be onboard the theseus mission we describe its central role in making theseus a powerful machine to probe the physical conditions of the early universe close to the reionization era and to explore the timedomain universe | [['we', 'summarize', 'in', 'this', 'contribution', 'the', 'capabilities', 'design', 'status', 'and', 'the', 'en', 'abling', 'technologies', 'of', 'the', 'soft', 'xray', 'imager', 'sxi', 'planned', 'to', 'be', 'onboard', 'the', 'theseus', 'mission', 'we', 'describe', 'its', 'central', 'role', 'in', 'making', 'theseus', 'a', 'powerful', 'machine', 'to', 'probe', 'the', 'physical', 'conditions', 'of', 'the', 'early', 'universe', 'close', 'to', 'the', 'reionization', 'era', 'and', 'to', 'explore', 'the', 'timedomain', 'universe']] | [-0.0915238636366108, 0.12503969162833273, -0.12919014970069392, 0.12263339478522539, -0.16603460371608667, -0.035187387724586745, -0.016637968389611495, 0.361968891270328, -0.2539656734780261, -0.3391225360203208, 0.14073166923123626, -0.2661761520920615, -0.1213577545100921, 0.22750860282726454, -0.04827803589011494, 0.006921489509598662, 0.04841955324732944, -0.06706608523075518, -0.0023989128765829824, -0.2538941500283647, 0.2638321441124406, 0.25491067558004143, 0.2287104259236928, -0.0036555970120325425, 0.10359332349412796, -0.012733920273093278, -0.09958925557306461, -0.06587519999920276, -0.18467525432597062, 0.0886114896356798, 0.31602274750669795, 0.24144835021395825, 0.2539017407975176, -0.4428891885960311, -0.1699583971252044, 0.1087132169489275, 0.08816448584803495, 0.003262214438189148, -0.03197326998046616, -0.29598461560447487, 0.039418826529167984, -0.18897032344370687, -0.1898243920714186, -0.043912295333779695, -0.02616272465603655, -0.02892558819107842, -0.17752329815636603, -0.05786704234452101, -0.055787055941069856, -0.024004789694261394, -0.10417236271927036, -0.017697640645660852, 0.05517900906699268, 0.14828330804103693, -0.008732533572535766, 0.07494937171015822, 0.16398603698696224, -0.21350576228200735, -0.08405857013636514, 0.37798289573963795, -0.05963117923391493, 0.04244298729208184, 0.19745333638172924, -0.2064647021817795, -0.20914020041297926, 0.061214862456708624, 0.18518885626996817, 0.05761293675587104, -0.17371641883724614, 0.09762386547752835, 0.1532872112451546, 0.17725508391301623, -0.0047933619158963365, 0.11519820931196016, 0.33714425901620926, 0.24247271930512956, 0.030774046462682777, 0.12557060491873703, -0.1529091512294192, -0.01962155223366592, -0.2999965728489323, -0.19109600641879074, -0.12840494555993037, 0.04266138698317503, -0.04232934141774629, -0.10742103796975132, 0.36382938116756186, 0.23166729199389616, 0.11548237208473056, -0.036061049153080636, 0.37354508014559223, -0.021638363355713522, 0.03172598165672338, 0.028006146649682994, 0.35590138199755494, 0.09896456334217076, 0.2240000106230901, -0.24217526153906396, 0.017931980799818246, 0.03087959235550411] |
1,802.01676 | The Infra-Red Telescope on board the THESEUS mission | The Infra-Red Telescope (IRT) on board the Transient High Energy Sky and
Early Universe Surveyor (THESEUS) ESA M5 candidate mission will play a key role
in identifying and characterizing moderate to high redshift Gamma-Ray Bursts
afterglows. The IRT is the enabling instrument on board THESEUS for measuring
autonomously the redshift of the several hundreds of GRBs detected per year by
the Soft X-ray Imager (SXI) and the X- and Gamma-Ray Imaging Spectrometer
(XGIS), and thus allowing the big ground based telescopes to be triggered on a
redshift pre-selected sample, and finally fulfilling the cosmological goals of
the mission. The IRT will be composed by a primary mirror of 0.7 m of diameter
coupled to a single camera in a Cassegrain design. It will work in the 0.7-1.8
{\mu}m wavelength range, and will provide a 10x10 arc min imaging field of view
with sub-arc second localization capabilities, and, at the same time, a 5x5 arc
min field of view with moderate (R up to ~500) spectroscopic capabilities. Its
sensitivity, mainly limited by the satellite jitter, is adapted to detect all
the GRBs, localized by the SXI/XGIS, and to acquire spectra for the majority of
them.
| astro-ph.IM | the infrared telescope irt on board the transient high energy sky and early universe surveyor theseus esa m5 candidate mission will play a key role in identifying and characterizing moderate to high redshift gammaray bursts afterglows the irt is the enabling instrument on board theseus for measuring autonomously the redshift of the several hundreds of grbs detected per year by the soft xray imager sxi and the x and gammaray imaging spectrometer xgis and thus allowing the big ground based telescopes to be triggered on a redshift preselected sample and finally fulfilling the cosmological goals of the mission the irt will be composed by a primary mirror of 07 m of diameter coupled to a single camera in a cassegrain design it will work in the 0718 mum wavelength range and will provide a 10x10 arc min imaging field of view with subarc second localization capabilities and at the same time a 5x5 arc min field of view with moderate r up to 500 spectroscopic capabilities its sensitivity mainly limited by the satellite jitter is adapted to detect all the grbs localized by the sxixgis and to acquire spectra for the majority of them | [['the', 'infrared', 'telescope', 'irt', 'on', 'board', 'the', 'transient', 'high', 'energy', 'sky', 'and', 'early', 'universe', 'surveyor', 'theseus', 'esa', 'm5', 'candidate', 'mission', 'will', 'play', 'a', 'key', 'role', 'in', 'identifying', 'and', 'characterizing', 'moderate', 'to', 'high', 'redshift', 'gammaray', 'bursts', 'afterglows', 'the', 'irt', 'is', 'the', 'enabling', 'instrument', 'on', 'board', 'theseus', 'for', 'measuring', 'autonomously', 'the', 'redshift', 'of', 'the', 'several', 'hundreds', 'of', 'grbs', 'detected', 'per', 'year', 'by', 'the', 'soft', 'xray', 'imager', 'sxi', 'and', 'the', 'x', 'and', 'gammaray', 'imaging', 'spectrometer', 'xgis', 'and', 'thus', 'allowing', 'the', 'big', 'ground', 'based', 'telescopes', 'to', 'be', 'triggered', 'on', 'a', 'redshift', 'preselected', 'sample', 'and', 'finally', 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-0.010787423974155294, 0.013168660106506044] |
1,802.01677 | THESEUS in the era of Multi-Messenger Astronomy | The recent discovery of the electromagnetic counterpart of the gravitational
wave source GW170817 has demonstrated the huge informative power of
multi-messenger observations. Late '20s and early '30s will be a mature era for
multi-messenger astronomy. Consolidated network of second generation
gravitational wave detectors, such as Advanced LIGO and Advanced Virgo, KAGRA
and LIGO-India, will be further powered by the contribution from third
generation interferometers such as Einstein Telescope and/or Cosmic Explorer.
Several astrophysical sources detectable in GWs are expected to radiate in the
full electromagentic spectrum and to emit high energy neutrinos, thus requiring
a robust synergy with ground- and space-based high energy detectors (e.g. CTA,
THESEUS, ATHENA), sensitive neutrino detectors (e.g. KM3Net, IceCube-Gen2) and
large size optical facilities (e.g. E-ELT). In this report we review the
fundamental role of THESEUS in this exciting context.
| astro-ph.IM | the recent discovery of the electromagnetic counterpart of the gravitational wave source gw170817 has demonstrated the huge informative power of multimessenger observations late 20s and early 30s will be a mature era for multimessenger astronomy consolidated network of second generation gravitational wave detectors such as advanced ligo and advanced virgo kagra and ligoindia will be further powered by the contribution from third generation interferometers such as einstein telescope andor cosmic explorer several astrophysical sources detectable in gws are expected to radiate in the full electromagentic spectrum and to emit high energy neutrinos thus requiring a robust synergy with ground and spacebased high energy detectors eg cta theseus athena sensitive neutrino detectors eg km3net icecubegen2 and large size optical facilities eg eelt in this report we review the fundamental role of theseus in this exciting context | [['the', 'recent', 'discovery', 'of', 'the', 'electromagnetic', 'counterpart', 'of', 'the', 'gravitational', 'wave', 'source', 'gw170817', 'has', 'demonstrated', 'the', 'huge', 'informative', 'power', 'of', 'multimessenger', 'observations', 'late', '20s', 'and', 'early', '30s', 'will', 'be', 'a', 'mature', 'era', 'for', 'multimessenger', 'astronomy', 'consolidated', 'network', 'of', 'second', 'generation', 'gravitational', 'wave', 'detectors', 'such', 'as', 'advanced', 'ligo', 'and', 'advanced', 'virgo', 'kagra', 'and', 'ligoindia', 'will', 'be', 'further', 'powered', 'by', 'the', 'contribution', 'from', 'third', 'generation', 'interferometers', 'such', 'as', 'einstein', 'telescope', 'andor', 'cosmic', 'explorer', 'several', 'astrophysical', 'sources', 'detectable', 'in', 'gws', 'are', 'expected', 'to', 'radiate', 'in', 'the', 'full', 'electromagentic', 'spectrum', 'and', 'to', 'emit', 'high', 'energy', 'neutrinos', 'thus', 'requiring', 'a', 'robust', 'synergy', 'with', 'ground', 'and', 'spacebased', 'high', 'energy', 'detectors', 'eg', 'cta', 'theseus', 'athena', 'sensitive', 'neutrino', 'detectors', 'eg', 'km3net', 'icecubegen2', 'and', 'large', 'size', 'optical', 'facilities', 'eg', 'eelt', 'in', 'this', 'report', 'we', 'review', 'the', 'fundamental', 'role', 'of', 'theseus', 'in', 'this', 'exciting', 'context']] | [-0.13150429435557237, 0.19714201423856947, -0.0022404514107081386, 0.15599411243952258, -0.17931944950035325, -0.07090836361878448, -0.0511745228940897, 0.354685470427352, -0.1729432384862944, -0.37635523638239615, 0.14488734901641254, -0.3476173600250924, -0.09070156520939673, 0.26771115735863094, 0.028688259833250886, 0.05210414614821612, 0.16055898487339382, -0.0718480848327831, -0.03281957858276588, -0.19351918875343269, 0.24335442313286304, 0.27249563770299706, 0.23055548547870583, -0.006439312119726781, 0.10128356576379803, -0.03564007232241608, -0.12232346002150465, -0.06356823325644385, -0.06131819233436275, 0.057933282888390954, 0.33533395630204016, 0.2574354968499392, 0.24432508091407792, -0.46588435719410576, -0.25112260185802976, 0.12287672734129484, 0.07935409553411538, 0.04696224900307479, -0.09698079889812679, -0.40084219659954584, 0.0048172536599277345, -0.2696620252293845, -0.16924529453670537, 0.02148739627941891, 0.021266977423457085, 0.08626031012412298, -0.17352275557609068, -0.004576577339321375, -0.07341513161556106, -0.061311152146232346, -0.07988411837981807, -0.08428642728227984, 0.05118108563970222, 0.0727662697641386, 0.019638944819517848, 0.09245852675047461, 0.11381861694174371, -0.2032047047900657, -0.09986378988940958, 0.3739301877061802, -0.11686865508004471, 0.012712618743103964, 0.1680559370364925, -0.21502504998266145, -0.19908789617043954, 0.12991819946198827, 0.20885882401769912, 0.08276872944121283, -0.1520060311657963, 0.03223224231645603, 0.1313570146830494, 0.17209796516932935, 0.10793705600210363, 0.1781120119995817, 0.4013310897405501, 0.23028288472581793, 0.0891894639659397, 0.0675409869765173, -0.2075403280970123, 0.07949210308595664, -0.29682127765759275, -0.12769206189377993, -0.17968111037173204, 0.10241744778080222, -0.03225417604542734, -0.09498048239016768, 0.35453853405816954, 0.15043548475606022, 0.0020749518164881954, -0.03939193770358408, 0.33879929605043596, 0.017004800483981078, 0.0853549172187707, 0.020739204985848456, 0.4113544091961726, 0.04903584627641572, 0.18602742335793596, -0.14593329611773326, 0.005126889706244348, -0.0258667516220292] |
1,802.01678 | THESEUS and the high redshift universe | Long-duration gamma-ray bursts (long-GRBs) can be detected throughout cosmic
history and provide several unique insights into star-formation and galaxy
evolution back to the era of reionization. They can be used to map star
formation, identify galaxies across the luminosity function, determine detailed
abundances even for the faintest of galaxies, quantify the escape fraction of
ionizing radiation and track the progress of reionization. Fully exploiting
these techniques requires a significant increase in the number of long-GRBs
identified and characterised at $z\gtrsim6$, which can be achieved through a
discovery mission with the capabilities of THESEUS, in combination with the
powerful follow-up facilities that will be available in the 2030s.
| astro-ph.IM | longduration gammaray bursts longgrbs can be detected throughout cosmic history and provide several unique insights into starformation and galaxy evolution back to the era of reionization they can be used to map star formation identify galaxies across the luminosity function determine detailed abundances even for the faintest of galaxies quantify the escape fraction of ionizing radiation and track the progress of reionization fully exploiting these techniques requires a significant increase in the number of longgrbs identified and characterised at zgtrsim6 which can be achieved through a discovery mission with the capabilities of theseus in combination with the powerful followup facilities that will be available in the 2030s | [['longduration', 'gammaray', 'bursts', 'longgrbs', 'can', 'be', 'detected', 'throughout', 'cosmic', 'history', 'and', 'provide', 'several', 'unique', 'insights', 'into', 'starformation', 'and', 'galaxy', 'evolution', 'back', 'to', 'the', 'era', 'of', 'reionization', 'they', 'can', 'be', 'used', 'to', 'map', 'star', 'formation', 'identify', 'galaxies', 'across', 'the', 'luminosity', 'function', 'determine', 'detailed', 'abundances', 'even', 'for', 'the', 'faintest', 'of', 'galaxies', 'quantify', 'the', 'escape', 'fraction', 'of', 'ionizing', 'radiation', 'and', 'track', 'the', 'progress', 'of', 'reionization', 'fully', 'exploiting', 'these', 'techniques', 'requires', 'a', 'significant', 'increase', 'in', 'the', 'number', 'of', 'longgrbs', 'identified', 'and', 'characterised', 'at', 'zgtrsim6', 'which', 'can', 'be', 'achieved', 'through', 'a', 'discovery', 'mission', 'with', 'the', 'capabilities', 'of', 'theseus', 'in', 'combination', 'with', 'the', 'powerful', 'followup', 'facilities', 'that', 'will', 'be', 'available', 'in', 'the', '2030s']] | [-0.027899572652412108, 0.12182671737761419, -0.08139517707053885, 0.11235494452102163, -0.12168919094881722, -0.0395753968759466, 0.023282221387897695, 0.4204034503096732, -0.2035885224092717, -0.3795147946226263, 0.07614292602748915, -0.27592528251078086, -0.012971705452443283, 0.24464409417150734, -0.008209682591955796, -0.03023710092268536, 0.09938144527166803, -0.10167571918132592, -0.015549742650032852, -0.32344650659083485, 0.23090540427087902, 0.15676669202414212, 0.1700562630806153, 0.003194666250008289, 0.0805203686490063, -0.09235096701516587, -0.13478299262541754, -0.016651211992976752, -0.1599881611408793, 0.03679950441077143, 0.30730277165187364, 0.24423640473771877, 0.24433577360985714, -0.42277274785615576, -0.24651366735973926, 0.1264721534223618, 0.22029120020707635, 0.037444612673901576, -0.08964498370132958, -0.29518804000255383, 0.05267204930483599, -0.18375079489147692, -0.1484744548188331, 0.005918619014044231, -0.01600454604932081, 0.04759395587318969, -0.18650383580580493, 0.06279074070783698, -0.04350711608949666, 0.024831138316228567, -0.0567483006776354, -0.01028889218763074, -0.04256083049471969, 0.15347399744727414, -0.006110046472330795, 0.08107905601212215, 0.1750772373215513, -0.18026515999895948, -0.050449338906975554, 0.3857903686552265, -0.07989784750530374, 0.01207573058858305, 0.20582164455831886, -0.22482027055121193, -0.19775721241902805, 0.17753037959163157, 0.18744490359187405, 0.06397333355603095, -0.18969067564738967, -0.013946784671100082, 0.0802331195500131, 0.18580560767631454, 0.030729422034591298, 0.0906140349837179, 0.3630191361026786, 0.1483095170599278, 0.058913542156838854, 0.09045785520591329, -0.14971058683417668, 0.02615534529203079, -0.24361443756339707, -0.134648515499049, -0.13398066218550725, 0.12378586751678697, -0.08079992752510262, -0.0864010272486675, 0.3804954176542358, 0.11823910320282122, 0.1901170508326771, 0.04608010694849148, 0.28083791098096106, 0.06641567681119646, 0.11195593669349066, 0.07307540111800778, 0.3257084542104243, 0.11391333354610915, 0.08061319319683641, -0.22960475765965077, 0.13166365279733402, -0.011103335964911244] |
1,802.01679 | Synergy between THESEUS and E-ELT | The Transient High Energy Sky and Early Universe Surveyor (THESEUS) is a
space mission concept aimed at exploiting Gamma-Ray Bursts for investigating
the early Universe and at providing a substantial advancement of
multi-messenger and time-domain astrophysics. A fundamental contribution to
achieve this goal will be provided by the powerful synergy between THESEUS and
the extremely large ground-based telescopes which will operate in the next
decade, like E-ELT. We discuss great improvements coming from this joint effort
and describe some possible observing scenarios.
| astro-ph.HE | the transient high energy sky and early universe surveyor theseus is a space mission concept aimed at exploiting gammaray bursts for investigating the early universe and at providing a substantial advancement of multimessenger and timedomain astrophysics a fundamental contribution to achieve this goal will be provided by the powerful synergy between theseus and the extremely large groundbased telescopes which will operate in the next decade like eelt we discuss great improvements coming from this joint effort and describe some possible observing scenarios | [['the', 'transient', 'high', 'energy', 'sky', 'and', 'early', 'universe', 'surveyor', 'theseus', 'is', 'a', 'space', 'mission', 'concept', 'aimed', 'at', 'exploiting', 'gammaray', 'bursts', 'for', 'investigating', 'the', 'early', 'universe', 'and', 'at', 'providing', 'a', 'substantial', 'advancement', 'of', 'multimessenger', 'and', 'timedomain', 'astrophysics', 'a', 'fundamental', 'contribution', 'to', 'achieve', 'this', 'goal', 'will', 'be', 'provided', 'by', 'the', 'powerful', 'synergy', 'between', 'theseus', 'and', 'the', 'extremely', 'large', 'groundbased', 'telescopes', 'which', 'will', 'operate', 'in', 'the', 'next', 'decade', 'like', 'eelt', 'we', 'discuss', 'great', 'improvements', 'coming', 'from', 'this', 'joint', 'effort', 'and', 'describe', 'some', 'possible', 'observing', 'scenarios']] | [-0.0978809954490649, 0.14005893750525103, -0.07629942159145707, 0.14873574422558816, -0.1697513742781267, -0.06826252834417107, 0.01574998847549645, 0.3615523253272219, -0.2281189837674724, -0.36877829545438745, 0.1460375379140648, -0.26993650963484517, -0.10728431127329426, 0.27896174579495336, -0.038595852226291485, 0.0015559304142143669, 0.13489462611288194, -0.12048055560941376, -0.02638694966033033, -0.2596882468078104, 0.25616589439294596, 0.26056254446143057, 0.2392991791910878, 0.004929386828912467, 0.13329508374785867, -0.038987610809982004, -0.13939427465154994, -0.022488956527412507, -0.1276139116252591, 0.12902584337493087, 0.36455516008342187, 0.2240368942275825, 0.3129083004030513, -0.41374694022191005, -0.22143247972310678, 0.15560346747828058, 0.08615597372550926, 0.051798199960768856, -0.10018768532928533, -0.3233257557560758, 0.013814042322337627, -0.20899704574868538, -0.1715576576023567, -0.05159534807118201, 0.021552885280604044, 0.013793143863994174, -0.17476035807872328, -0.05094284981080308, -0.047402000503341965, 0.026033632207389284, -0.0531522815751775, -0.05186764125587282, 0.08094525683625806, 0.14961225890395483, 0.02207705226198702, 0.10195729548747583, 0.05187178697584697, -0.17836883440954474, -0.07865424043067344, 0.4038220374595101, -0.09033430402348863, 0.039397871282900024, 0.20672878993834118, -0.2294523120891848, -0.2178305511465069, 0.11055071551136945, 0.19732424577062085, 0.06616745935469048, -0.1630248518478943, 0.0718105345270199, 0.12136827082168765, 0.13018596685057074, 0.05787730448390925, 0.1250996154025992, 0.36643188496733586, 0.26838230434805155, 0.10363124146285217, 0.09141547679077698, -0.17560195352700425, 0.005623277616772301, -0.3012480344964055, -0.13852887539897205, -0.17091008458036658, 0.06180355969316712, -0.05483672931338178, -0.02179463785823162, 0.3991158084160217, 0.1563624914695804, 0.081856953752477, 0.011158575083799206, 0.3254843077894936, -0.01761627407452069, 0.05842338740916514, 0.024621548471836056, 0.3499798129341798, 0.03063477958813764, 0.19432193689366303, -0.18003184122612653, 0.039566686331498915, -0.03097232476745664] |
1,802.0168 | First Stars, Reionization and Gamma-Ray Bursts | Gamma-Ray Bursts represent unique tools to study the early phases of cosmic
evolution, the formation of the first stars and galaxies. Absorption line
spectra of these sources located in the Epoch of Reionization might provide us
with key information about these remote, and yet fundamental, stages of cosmic
history. I will briefly review these issues, highlighting the immense leap that
the \TH mission could represent for finding answers to the many fundamental
open questions.
| astro-ph.IM | gammaray bursts represent unique tools to study the early phases of cosmic evolution the formation of the first stars and galaxies absorption line spectra of these sources located in the epoch of reionization might provide us with key information about these remote and yet fundamental stages of cosmic history i will briefly review these issues highlighting the immense leap that the th mission could represent for finding answers to the many fundamental open questions | [['gammaray', 'bursts', 'represent', 'unique', 'tools', 'to', 'study', 'the', 'early', 'phases', 'of', 'cosmic', 'evolution', 'the', 'formation', 'of', 'the', 'first', 'stars', 'and', 'galaxies', 'absorption', 'line', 'spectra', 'of', 'these', 'sources', 'located', 'in', 'the', 'epoch', 'of', 'reionization', 'might', 'provide', 'us', 'with', 'key', 'information', 'about', 'these', 'remote', 'and', 'yet', 'fundamental', 'stages', 'of', 'cosmic', 'history', 'i', 'will', 'briefly', 'review', 'these', 'issues', 'highlighting', 'the', 'immense', 'leap', 'that', 'the', 'th', 'mission', 'could', 'represent', 'for', 'finding', 'answers', 'to', 'the', 'many', 'fundamental', 'open', 'questions']] | [-0.0866558421214388, 0.10930226815587564, -0.06610362601743357, 0.10494797145696105, -0.11294682469923754, -0.07719457043158645, 0.022010489480217565, 0.36816800939472943, -0.25538326955928997, -0.3503519032855292, 0.10276453478051022, -0.2968824797788182, -0.07025727706432745, 0.21404903817519144, -0.03762522986712488, -0.025130029956533295, 0.07589198092417163, -0.06313606882994881, -0.0032866471100950964, -0.3168411259602353, 0.3218752777084356, 0.1474428042970799, 0.1947305203742675, 0.045291885267943144, 0.04810563677519157, -0.10374427043102882, -0.1695608460168178, -0.07547545141691493, -0.18004211645333074, 0.1325143679789255, 0.3342009709952903, 0.24625490924242782, 0.24920631233426566, -0.4300379144732614, -0.24129083030227874, 0.1036685562757083, 0.20585471773016695, 0.08228426077403128, -0.08316028832986548, -0.27994981759252985, 0.04258202084314984, -0.09460201016249689, -0.17396681852689064, 0.007891761076108023, 0.04574377911568091, 0.040320131924582295, -0.11978761434580225, 0.03265940392471699, 0.03307582062316706, 0.012753889037019297, -0.08858178960430008, -0.07255471758292736, 0.036578064702602255, 0.20634863411101537, 0.043373192248337376, 0.023634016131541716, 0.1342489558423089, -0.16607880011528126, -0.12801579683012254, 0.420235964394099, -0.02065078535029111, 0.06941879173816257, 0.2116238238994737, -0.20542837110543907, -0.26438068086753375, 0.09280452488392994, 0.16830279836682854, 0.04232561677643979, -0.1860003104729175, -0.0056508487464885255, 0.06289045625315928, 0.16410289209405263, 0.05966616880047966, 0.11276628143103742, 0.3944232976693358, 0.15615821805958813, 0.009985710468262786, 0.04097520285663572, -0.11674073931912111, -0.05010452582123312, -0.29910175365905556, -0.15404448904902548, -0.09032088723914647, 0.10784186982876949, -0.07911184947973911, -0.13890764329226915, 0.4120146683543115, 0.17578709266947684, 0.15965582716681465, -0.04804412752226297, 0.2645634067169315, 0.0069266960805130975, -0.004547808986358546, 0.06594774273312273, 0.2715446598941108, 0.1586783857893425, 0.12593704428070704, -0.19046393298619502, 0.0951653970908877, 0.007966688277225036] |
1,802.01681 | The SVOM mission, a pathfinder for THESEUS | The Sino-French space mission SVOM (Space-based multi-band astronomical
Variable Objects Monitor) is mainly designed to detect and localize Gamma-Ray
Burst events (GRBs). The satellite, to be launched late 2021, embarks a set of
gamma-ray, X-ray and optical imagers. Thanks to its pointing strategy, quick
slew capability and fast data connection to earth, ground based observations
with large telescopes will allow us to measure redshifts for an unprecedented
sample of GRBs. We discuss here the overall science goals of the SVOM mission
in the framework of the multi-wavelength and multi-messenger panorama of the
next decade. Finally we show how some developments of the SVOM mission will be
helpful for the THESEUS project.
| astro-ph.IM | the sinofrench space mission svom spacebased multiband astronomical variable objects monitor is mainly designed to detect and localize gammaray burst events grbs the satellite to be launched late 2021 embarks a set of gammaray xray and optical imagers thanks to its pointing strategy quick slew capability and fast data connection to earth ground based observations with large telescopes will allow us to measure redshifts for an unprecedented sample of grbs we discuss here the overall science goals of the svom mission in the framework of the multiwavelength and multimessenger panorama of the next decade finally we show how some developments of the svom mission will be helpful for the theseus project | [['the', 'sinofrench', 'space', 'mission', 'svom', 'spacebased', 'multiband', 'astronomical', 'variable', 'objects', 'monitor', 'is', 'mainly', 'designed', 'to', 'detect', 'and', 'localize', 'gammaray', 'burst', 'events', 'grbs', 'the', 'satellite', 'to', 'be', 'launched', 'late', '2021', 'embarks', 'a', 'set', 'of', 'gammaray', 'xray', 'and', 'optical', 'imagers', 'thanks', 'to', 'its', 'pointing', 'strategy', 'quick', 'slew', 'capability', 'and', 'fast', 'data', 'connection', 'to', 'earth', 'ground', 'based', 'observations', 'with', 'large', 'telescopes', 'will', 'allow', 'us', 'to', 'measure', 'redshifts', 'for', 'an', 'unprecedented', 'sample', 'of', 'grbs', 'we', 'discuss', 'here', 'the', 'overall', 'science', 'goals', 'of', 'the', 'svom', 'mission', 'in', 'the', 'framework', 'of', 'the', 'multiwavelength', 'and', 'multimessenger', 'panorama', 'of', 'the', 'next', 'decade', 'finally', 'we', 'show', 'how', 'some', 'developments', 'of', 'the', 'svom', 'mission', 'will', 'be', 'helpful', 'for', 'the', 'theseus', 'project']] | [-0.06640898258250148, 0.14723626942584095, -0.10759402094157161, 0.141629755510613, -0.22784918945215576, -0.06739654366833132, 0.0635906751267612, 0.440102897861318, -0.20603424669788764, -0.37844582205755756, 0.1392495969870455, -0.3264261608825879, -0.07770769843917659, 0.2920977346691395, -0.08601543289055494, 0.05297180103203114, 0.16154578064677413, -0.11805157690006937, -0.04202546147411471, -0.31089843004765744, 0.21539761973985447, 0.24753317226831978, 0.20590790695728953, -0.05252274672022542, 0.10031954434108795, -0.026625090752736672, -0.12624427816738282, -0.0651960131832344, -0.11736869522127079, 0.10431806663437201, 0.3505398886496419, 0.2551510631199087, 0.24405069019108475, -0.40878243331747866, -0.18925170956162718, 0.1194756329206431, 0.07821761666134268, -0.02959168351649701, -0.002391523622848966, -0.4041462753823883, 0.006052112307500195, -0.22458744363708272, -0.21572808910849262, -0.041628860176314376, 0.03417160323409884, 0.07365794155562112, -0.1550997182357687, -0.08933771800182692, -0.05933339393756411, 0.039788898802152625, -0.1535885275545035, 0.04688706313394144, 0.05509668196601843, 0.1357543291566004, 0.04239006383084432, 0.11078515255756609, 0.06373510346118663, -0.12327898250313828, -0.08957838568299471, 0.41054150715537435, -0.04136894416034658, 0.06560689670470048, 0.16552730666700047, -0.22216134046430927, -0.21419419830681774, 0.11838047904474241, 0.22859057953564432, 0.0844280163984041, -0.18141627980412933, 0.016157691750826465, 0.07986119418060994, 0.1990203384880547, -0.028161080004563473, 0.12736140061505474, 0.3177423938743871, 0.2179798519035365, 0.12208365596598014, 0.09004638998282587, -0.3159229148279976, 0.058571758085383556, -0.26347767260462585, -0.17529854899364616, -0.16769074311748416, 0.05758597986617928, -0.021641630351623135, -0.06935168716737682, 0.4115493589307408, 0.2079549922150568, 0.09889425509735136, 0.0021210396410645664, 0.2958586863367944, -0.03562839269553634, 0.05441152267179007, 0.022231965761019237, 0.3558170571139288, 0.0362511358039269, 0.16066914465412632, -0.15405864365449226, 0.030125041718821268, 0.009352653985843062] |
1,802.01682 | The link between short Gamma-ray bursts and Gravitational Waves:
perspectives for the THESEUS mission | The knowledge of the class of short Gamma-Ray Bursts (GRBs), characterised by
a duration of the gamma-ray emission $\leq 2$ s, experienced an impressive
boost in the last decade. In particular, the discovery of short GRB afterglows
in 2005 with Swift and HETE-II provided the first insight into their energy
scale, environments and host galaxies. The lack of detection of associated
supernovae proved that they are not related to the death of massive stars. The
increasing evidence for compact object binary progenitors makes short GRBs one
of the most promising sources of gravitational waves for the forthcoming
Advanced LIGO/Virgo science runs. To this end, the spectacular detection of the
first electromagnetic counterpart of the gravitational wave event GW\,170817
originated by the coalescence of a double neutron star (NS) system, represents
a first hystorical milestone. The (weak) short GRB\,170817A associated to this
GW event provided the long-sought evidence that at least a fraction of short
GRBs are originated by NS-NS merging and suggested the intriguing possibility
that relativistic jets can be launched in the process of a NS-NS merger. The
THESEUS mission, thanks to the diversity of intstrumentation, fast pointing and
flexible schedule will represent a key facility in the multi-messenger
astronomy era.
| astro-ph.HE | the knowledge of the class of short gammaray bursts grbs characterised by a duration of the gammaray emission leq 2 s experienced an impressive boost in the last decade in particular the discovery of short grb afterglows in 2005 with swift and heteii provided the first insight into their energy scale environments and host galaxies the lack of detection of associated supernovae proved that they are not related to the death of massive stars the increasing evidence for compact object binary progenitors makes short grbs one of the most promising sources of gravitational waves for the forthcoming advanced ligovirgo science runs to this end the spectacular detection of the first electromagnetic counterpart of the gravitational wave event gw170817 originated by the coalescence of a double neutron star ns system represents a first hystorical milestone the weak short grb170817a associated to this gw event provided the longsought evidence that at least a fraction of short grbs are originated by nsns merging and suggested the intriguing possibility that relativistic jets can be launched in the process of a nsns merger the theseus mission thanks to the diversity of intstrumentation fast pointing and flexible schedule will represent a key facility in the multimessenger astronomy era | [['the', 'knowledge', 'of', 'the', 'class', 'of', 'short', 'gammaray', 'bursts', 'grbs', 'characterised', 'by', 'a', 'duration', 'of', 'the', 'gammaray', 'emission', 'leq', '2', 's', 'experienced', 'an', 'impressive', 'boost', 'in', 'the', 'last', 'decade', 'in', 'particular', 'the', 'discovery', 'of', 'short', 'grb', 'afterglows', 'in', '2005', 'with', 'swift', 'and', 'heteii', 'provided', 'the', 'first', 'insight', 'into', 'their', 'energy', 'scale', 'environments', 'and', 'host', 'galaxies', 'the', 'lack', 'of', 'detection', 'of', 'associated', 'supernovae', 'proved', 'that', 'they', 'are', 'not', 'related', 'to', 'the', 'death', 'of', 'massive', 'stars', 'the', 'increasing', 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1,802.01683 | THESEUS and Gamma-Ray Bursts: a valuable contribution to the
understanding of prompt emission | Recent advances in fitting prompt emission spectra in gamma-ray bursts (GRBs)
are boosting our understanding of the still elusive origin of this radiation.
These progresses have been possible thanks to a more detailed analysis of the
low-energy part ($<$\,100\,keV) of the prompt spectrum, where the spectral
shape is sometimes found to deviate from a simple power-law shape. This
deviation is well described by a spectral break or, alternatively by the
addition of a thermal component. Spectral data extending down to less than
1\,keV are extremely relevant for these studies, but presently they are
available only for a small subsample of {\it Swift} GRBs observed by XRT (the
X-ray telescope, 0.3-10\,keV) during the prompt emission. The space mission
\th\ will allow a systematic study of prompt spectra from 0.3\,keV to several
MeV. We show that observations performed by \th\ will allow us to discriminate
between different models presently considered for GRB prompt studies, solving
the long-standing open issue about the nature of the prompt radiation, with
relevant consequences on the location of the emitting region, magnetic field
strength and presence of thermal components.
| astro-ph.HE | recent advances in fitting prompt emission spectra in gammaray bursts grbs are boosting our understanding of the still elusive origin of this radiation these progresses have been possible thanks to a more detailed analysis of the lowenergy part 100kev of the prompt spectrum where the spectral shape is sometimes found to deviate from a simple powerlaw shape this deviation is well described by a spectral break or alternatively by the addition of a thermal component spectral data extending down to less than 1kev are extremely relevant for these studies but presently they are available only for a small subsample of it swift grbs observed by xrt the xray telescope 0310kev during the prompt emission the space mission th will allow a systematic study of prompt spectra from 03kev to several mev we show that observations performed by th will allow us to discriminate between different models presently considered for grb prompt studies solving the longstanding open issue about the nature of the prompt radiation with relevant consequences on the location of the emitting region magnetic field strength and presence of thermal components | [['recent', 'advances', 'in', 'fitting', 'prompt', 'emission', 'spectra', 'in', 'gammaray', 'bursts', 'grbs', 'are', 'boosting', 'our', 'understanding', 'of', 'the', 'still', 'elusive', 'origin', 'of', 'this', 'radiation', 'these', 'progresses', 'have', 'been', 'possible', 'thanks', 'to', 'a', 'more', 'detailed', 'analysis', 'of', 'the', 'lowenergy', 'part', '100kev', 'of', 'the', 'prompt', 'spectrum', 'where', 'the', 'spectral', 'shape', 'is', 'sometimes', 'found', 'to', 'deviate', 'from', 'a', 'simple', 'powerlaw', 'shape', 'this', 'deviation', 'is', 'well', 'described', 'by', 'a', 'spectral', 'break', 'or', 'alternatively', 'by', 'the', 'addition', 'of', 'a', 'thermal', 'component', 'spectral', 'data', 'extending', 'down', 'to', 'less', 'than', '1kev', 'are', 'extremely', 'relevant', 'for', 'these', 'studies', 'but', 'presently', 'they', 'are', 'available', 'only', 'for', 'a', 'small', 'subsample', 'of', 'it', 'swift', 'grbs', 'observed', 'by', 'xrt', 'the', 'xray', 'telescope', '0310kev', 'during', 'the', 'prompt', 'emission', 'the', 'space', 'mission', 'th', 'will', 'allow', 'a', 'systematic', 'study', 'of', 'prompt', 'spectra', 'from', '03kev', 'to', 'several', 'mev', 'we', 'show', 'that', 'observations', 'performed', 'by', 'th', 'will', 'allow', 'us', 'to', 'discriminate', 'between', 'different', 'models', 'presently', 'considered', 'for', 'grb', 'prompt', 'studies', 'solving', 'the', 'longstanding', 'open', 'issue', 'about', 'the', 'nature', 'of', 'the', 'prompt', 'radiation', 'with', 'relevant', 'consequences', 'on', 'the', 'location', 'of', 'the', 'emitting', 'region', 'magnetic', 'field', 'strength', 'and', 'presence', 'of', 'thermal', 'components']] | [-0.022906583852190934, 0.14764323404217447, -0.080128031296676, 0.14719726173155992, -0.11366351366706402, -0.10527906964205533, 0.03756046897839182, 0.4294467996447705, -0.20125088105387576, -0.3545826478262565, 0.0732619952510244, -0.3230156956655024, -0.017683036557582955, 0.24852461392535818, 0.002958564848765721, 0.018206505534740593, 0.08262315388912192, -0.06199125773887467, -0.055442855426987916, -0.182117794599425, 0.2838184947332183, 0.13983185494646103, 0.2212551040272676, 0.050819826733249314, 0.012954964798204805, -0.037898113420281904, -0.08517514093993948, -0.024702548361696806, -0.1069256351932651, 0.0843270797999499, 0.24053533107214137, 0.11523269273335585, 0.18600582895073836, -0.38971675826993946, -0.2797595238118627, 0.1367444453497448, 0.13887429253932518, 0.02445181445436102, -0.022148505740835468, -0.27141035580240025, 0.05457410119361357, -0.16955622549905636, -0.15702522569080138, -0.02526737796398555, 0.025201399046236875, 0.015908251292645358, -0.17846664420142258, 0.08114903313133374, 0.019727047857096686, 0.030082754401878995, -0.07081703521736007, -0.06653244030702818, 0.007768183119548996, 0.09426607909883566, 0.10370220962315696, 0.03261754800601361, 0.11653827583918777, -0.1399871974033406, -0.07948949887381437, 0.39138582385667076, -0.03251773326449508, -0.001821134520878831, 0.1771013739641633, -0.190822712903085, -0.19285292307344767, 0.21205572579004853, 0.13150164596675665, 0.1105418191163463, -0.18046809337869452, 0.017791282170387255, 0.019086518355614538, 0.20908952544246298, 0.016129376984631214, 0.07451087909310565, 0.27328198658466174, 0.1520823197916488, -0.017856480554106022, 0.11328098137292418, -0.17597532212020378, -0.02276847797866839, -0.3012606516214354, -0.07807521893806592, -0.14666844141454652, 0.11291025749696829, -0.04040911173245519, -0.11897021942454708, 0.42519053724686523, 0.11233895453419741, 0.2195591349615255, 0.006753509179151689, 0.30002638227357475, 0.07935644989989309, 0.06321260219076547, 0.07079368662396139, 0.3550378869461653, 0.12543504835096198, 0.1290327192355807, -0.20539608705599516, 0.08152590750442859, -0.031080135168599803] |
1,802.01684 | GRB Cosmography with THESEUS | Gamma-ray Bursts can be used as distance indicators using the Combo relation.
We show how the proposed THESEUS mission will allow us to investigate the
evolution history of the Universe at high redshift with GRBs. Assuming that
THESEUS will measure the redshift for 800 GRBs, we show that the accuracy on
the cosmological parameters of the main cosmological models will greatly
improve, so that we can use GRBs as additional and independent cosmological
probes and also put strong constraints on the evolution of the dark energy
equation of state parameter $w(z)$.
| astro-ph.IM | gammaray bursts can be used as distance indicators using the combo relation we show how the proposed theseus mission will allow us to investigate the evolution history of the universe at high redshift with grbs assuming that theseus will measure the redshift for 800 grbs we show that the accuracy on the cosmological parameters of the main cosmological models will greatly improve so that we can use grbs as additional and independent cosmological probes and also put strong constraints on the evolution of the dark energy equation of state parameter wz | [['gammaray', 'bursts', 'can', 'be', 'used', 'as', 'distance', 'indicators', 'using', 'the', 'combo', 'relation', 'we', 'show', 'how', 'the', 'proposed', 'theseus', 'mission', 'will', 'allow', 'us', 'to', 'investigate', 'the', 'evolution', 'history', 'of', 'the', 'universe', 'at', 'high', 'redshift', 'with', 'grbs', 'assuming', 'that', 'theseus', 'will', 'measure', 'the', 'redshift', 'for', '800', 'grbs', 'we', 'show', 'that', 'the', 'accuracy', 'on', 'the', 'cosmological', 'parameters', 'of', 'the', 'main', 'cosmological', 'models', 'will', 'greatly', 'improve', 'so', 'that', 'we', 'can', 'use', 'grbs', 'as', 'additional', 'and', 'independent', 'cosmological', 'probes', 'and', 'also', 'put', 'strong', 'constraints', 'on', 'the', 'evolution', 'of', 'the', 'dark', 'energy', 'equation', 'of', 'state', 'parameter', 'wz']] | [-0.06277364897695216, 0.1202912702951785, -0.1339867576793, 0.1671435077480235, -0.1554104271293669, -0.06693397605136692, 0.034973297820805195, 0.3979436226322183, -0.22439162588709002, -0.34826045223399177, 0.051776580179908445, -0.27548454820618523, -0.026263307508818067, 0.24370766177793945, -0.0008260408047955115, 0.023619483122704447, 0.0934855375224008, -0.040926716692111155, -0.06833993136380022, -0.3237892715439487, 0.3296407644251863, 0.17978153602926286, 0.21451106058576933, 0.009196325358781185, 0.13215514348185325, -0.06299220319008353, -0.06910656880751088, 0.0007778249148811613, -0.22109026606519294, 0.021642962808383036, 0.2143452763447495, 0.2007338423159576, 0.2168283830780618, -0.38046174130023835, -0.26808230201253197, 0.13960114689953215, 0.1695093630127363, 0.07176427401929766, -0.02674827604186158, -0.29724720660801773, 0.048175959346386105, -0.21265823658105437, -0.12221631490635676, -0.03325171452425011, -0.020109763870445583, 0.09518428575656898, -0.18950164571895703, 0.08590367995938132, -0.03894452495592554, -0.08811286396787062, -0.09141122425937064, -0.04060328914528037, -0.01808014757685609, 0.10600455368838303, 0.061077039453436385, 0.04116516707178492, 0.10940275502974516, -0.13629435473582246, -0.08067362335930159, 0.40704073503122223, -0.14842877695899825, -0.0859265091245646, 0.18945253208269375, -0.17398441377720172, -0.1997732050655471, 0.012702051092164365, 0.1839146069422106, 0.04281909003403488, -0.1389614772870318, 0.07050666833107083, 0.05409752041265205, 0.24124097879361975, 0.01755750375853565, 0.08937512254751809, 0.27852406375273897, 0.1463180780820139, 0.059914854037892686, 0.058340989343648016, -0.15819003206299065, 0.03682675602549052, -0.3461109219876292, -0.13779967266984366, -0.14728834998926946, 0.10435747992820464, -0.15477262184012344, -0.07928013577954945, 0.39397999649908355, 0.2055214543591489, 0.16464877066683475, 0.06941536160257573, 0.24798102083278226, 0.06613386605334069, 0.04101122061819207, 0.050160377844144684, 0.34842855024796265, 0.07362401972084746, 0.08979914561528099, -0.22164804924913978, 0.09263203045926414, 0.020329480640242224] |
1,802.01685 | GPU-accelerated broadband analysis of multi-messenger GRB light curves | High-frequency multi-messenger observations provide a powerful probe of
gamma-ray bursts (GRBs), pioneered by {\em BeppoSAX} in gamma-rays and
LIGO-Virgo in gravitational waves. Identifying the central engines - magnetars
or black holes - also promises to improve on GRBs as probes of cosmological
evolution. THESEUS' design is ideally suited to pursue both science objectives.
Here, we present a general-purpose {\em graphics processor units}
(GPU)-accelerated broadband search algorithm for long duration ascending and
descending chirps, post-merger or from core-collapse of massive stars, in
electromagnetic and gravitational radiation. It implements butterfly filtering
using banks of up to 8 million templates of 1 second duration at over one
million correlations per second by heterogeneous computing using a dozen
high-end GPUs. We demonstrate its application with the identification of
broadband Kolmogorov spectra in long GRBs and the long duration ascending chirp
in the merger GW170817. The first shows a noticeable absence of a high
frequency bump, otherwise expected from newly formed magnetar central engines.
The second illustrates the need for deep searches to identify GRB central
engines in descending chirps in gravitational waves, post-merger or from nearby
energetic core-collapse supernovae. A future catalogue of THESEUS' GRBs
covering a broad range of redshifts may probe the nature of the cosmological
vacuum and establish the de Sitter limit as a turning point in cosmological
evolution.
| astro-ph.IM | highfrequency multimessenger observations provide a powerful probe of gammaray bursts grbs pioneered by em bepposax in gammarays and ligovirgo in gravitational waves identifying the central engines magnetars or black holes also promises to improve on grbs as probes of cosmological evolution theseus design is ideally suited to pursue both science objectives here we present a generalpurpose em graphics processor units gpuaccelerated broadband search algorithm for long duration ascending and descending chirps postmerger or from corecollapse of massive stars in electromagnetic and gravitational radiation it implements butterfly filtering using banks of up to 8 million templates of 1 second duration at over one million correlations per second by heterogeneous computing using a dozen highend gpus we demonstrate its application with the identification of broadband kolmogorov spectra in long grbs and the long duration ascending chirp in the merger gw170817 the first shows a noticeable absence of a high frequency bump otherwise expected from newly formed magnetar central engines the second illustrates the need for deep searches to identify grb central engines in descending chirps in gravitational waves postmerger or from nearby energetic corecollapse supernovae a future catalogue of theseus grbs covering a broad range of redshifts may probe the nature of the cosmological vacuum and establish the de sitter limit as a turning point in cosmological evolution | [['highfrequency', 'multimessenger', 'observations', 'provide', 'a', 'powerful', 'probe', 'of', 'gammaray', 'bursts', 'grbs', 'pioneered', 'by', 'em', 'bepposax', 'in', 'gammarays', 'and', 'ligovirgo', 'in', 'gravitational', 'waves', 'identifying', 'the', 'central', 'engines', 'magnetars', 'or', 'black', 'holes', 'also', 'promises', 'to', 'improve', 'on', 'grbs', 'as', 'probes', 'of', 'cosmological', 'evolution', 'theseus', 'design', 'is', 'ideally', 'suited', 'to', 'pursue', 'both', 'science', 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1,802.01686 | Synergies between the Cherenkov Telescope Array and THESEUS | The Cherenkov Telescope Array (CTA) is designed to be the next major
observatory operating in the Very High Energy (VHE, $\gtrsim 100$ GeV)
gamma-ray band. It will build on the imaging atmospheric Cherenkov technique
but will go much further in terms of performance than current instruments. Its
sensitivity at short timescales and the rapid repointing system will make CTA a
perfect facility to observe the gamma-ray transient sky. In this respect, the
synergies between CTA and other multi-wavelength and multi-messenger facilities
are expected to further enhance CTA's scientific scope. Thanks to its
characteristics, THESEUS will perform an unprecedented monitoring of the X-ray
variable sky, detecting, localising, and identifying transients. It will
provide external triggers and accurate location for the CTA follow-up of
transients, and their broadband characterisation, playing a key role for CTA
after the next decade.
| astro-ph.HE astro-ph.IM | the cherenkov telescope array cta is designed to be the next major observatory operating in the very high energy vhe gtrsim 100 gev gammaray band it will build on the imaging atmospheric cherenkov technique but will go much further in terms of performance than current instruments its sensitivity at short timescales and the rapid repointing system will make cta a perfect facility to observe the gammaray transient sky in this respect the synergies between cta and other multiwavelength and multimessenger facilities are expected to further enhance ctas scientific scope thanks to its characteristics theseus will perform an unprecedented monitoring of the xray variable sky detecting localising and identifying transients it will provide external triggers and accurate location for the cta followup of transients and their broadband characterisation playing a key role for cta after the next decade | [['the', 'cherenkov', 'telescope', 'array', 'cta', 'is', 'designed', 'to', 'be', 'the', 'next', 'major', 'observatory', 'operating', 'in', 'the', 'very', 'high', 'energy', 'vhe', 'gtrsim', '100', 'gev', 'gammaray', 'band', 'it', 'will', 'build', 'on', 'the', 'imaging', 'atmospheric', 'cherenkov', 'technique', 'but', 'will', 'go', 'much', 'further', 'in', 'terms', 'of', 'performance', 'than', 'current', 'instruments', 'its', 'sensitivity', 'at', 'short', 'timescales', 'and', 'the', 'rapid', 'repointing', 'system', 'will', 'make', 'cta', 'a', 'perfect', 'facility', 'to', 'observe', 'the', 'gammaray', 'transient', 'sky', 'in', 'this', 'respect', 'the', 'synergies', 'between', 'cta', 'and', 'other', 'multiwavelength', 'and', 'multimessenger', 'facilities', 'are', 'expected', 'to', 'further', 'enhance', 'ctas', 'scientific', 'scope', 'thanks', 'to', 'its', 'characteristics', 'theseus', 'will', 'perform', 'an', 'unprecedented', 'monitoring', 'of', 'the', 'xray', 'variable', 'sky', 'detecting', 'localising', 'and', 'identifying', 'transients', 'it', 'will', 'provide', 'external', 'triggers', 'and', 'accurate', 'location', 'for', 'the', 'cta', 'followup', 'of', 'transients', 'and', 'their', 'broadband', 'characterisation', 'playing', 'a', 'key', 'role', 'for', 'cta', 'after', 'the', 'next', 'decade']] | [-0.09173660144574403, 0.15940728082152059, -0.02922216744457854, 0.1483753454373524, -0.15685390334331642, -0.09618461663651205, 0.018343835166675874, 0.46103283123922173, -0.21915638642249644, -0.3745813934666948, 0.1552896396754935, -0.30217345508943944, -0.04140683905948905, 0.31302006405703453, 0.0010686780795128676, 0.006849181721918285, 0.178315692676408, -0.08686096105281856, -0.015039467694659303, -0.24641007898089878, 0.17623254771337565, 0.2833849613157094, 0.24276124863769777, 0.05522152810887753, 0.09499122164242758, -0.022693616670750108, -0.10144842015647322, -0.08346171320218893, -0.08226370312491038, 0.07667854945957117, 0.33829668117687106, 0.1736960042213654, 0.24134208264345997, -0.3993095287689463, -0.17789767370525286, 0.12679130808504666, 0.1013078313294533, -0.035377617092653565, -0.00030875820785516154, -0.36181687383511424, 0.04607175952707329, -0.21427730852941962, -0.22660169575064287, -0.006725859617556099, 4.788663197499122e-05, 0.07095873774960637, -0.1813788286547931, -0.06152088403783358, -0.042432835724979745, 0.031591800117973974, -0.09747315434072792, -0.059797829437667815, 0.04280388919402077, 0.1435102793306493, 0.02229069993086839, 0.0758152779286904, 0.11555154763848731, -0.2017946464687681, -0.0747836621702958, 0.36804308802616803, -0.03826719805664964, 0.010602009664527583, 0.19010450913958307, -0.2087551607294892, -0.18143885674798033, 0.1688533526417004, 0.20498127444055828, 0.08066972378423831, -0.19174241974786685, 0.01853333201928975, 0.09028492650411425, 0.2080905312488712, 0.040645206051395974, 0.12281248730736492, 0.31949635766562157, 0.25699655241315955, 0.17087453134726718, 0.11515488135874828, -0.28682972536843787, 0.042159056800832276, -0.2707104051390486, -0.1319791037073303, -0.12084415954381336, 0.09705700549929247, -0.036501920366715845, -0.08144436531401084, 0.4345169045561313, 0.19806846734272301, 0.04945525929185623, -0.0046016618993514, 0.30632929484713417, 0.00048015734697454165, 0.07950909403458672, -0.021045313334010923, 0.3642720707087186, 0.02943031646882313, 0.2043282435901028, -0.1667975721562988, 0.05930346799980387, -0.028344150998011013] |
1,802.01687 | Infrared emission from gravitational wave sources with THESEUS/IRT | With the discovery of the electromagnetic counterpart of the gravitational
wave source GW170817 the multi-messenger era is started. The identification of
an electromagnetic counterpart is crucial to understand the nature of the
detected gravitational wave sources and to maximize the scientific return of
their detections. The role of the instrument THESEUS/IRT will be crucial in
this field, in particular in localizing afterglows of gamma-ray bursts within
few minutes from the trigger and in identifying optical/NIR isotropic emissions
such as kilonovae.
| astro-ph.IM | with the discovery of the electromagnetic counterpart of the gravitational wave source gw170817 the multimessenger era is started the identification of an electromagnetic counterpart is crucial to understand the nature of the detected gravitational wave sources and to maximize the scientific return of their detections the role of the instrument theseusirt will be crucial in this field in particular in localizing afterglows of gammaray bursts within few minutes from the trigger and in identifying opticalnir isotropic emissions such as kilonovae | [['with', 'the', 'discovery', 'of', 'the', 'electromagnetic', 'counterpart', 'of', 'the', 'gravitational', 'wave', 'source', 'gw170817', 'the', 'multimessenger', 'era', 'is', 'started', 'the', 'identification', 'of', 'an', 'electromagnetic', 'counterpart', 'is', 'crucial', 'to', 'understand', 'the', 'nature', 'of', 'the', 'detected', 'gravitational', 'wave', 'sources', 'and', 'to', 'maximize', 'the', 'scientific', 'return', 'of', 'their', 'detections', 'the', 'role', 'of', 'the', 'instrument', 'theseusirt', 'will', 'be', 'crucial', 'in', 'this', 'field', 'in', 'particular', 'in', 'localizing', 'afterglows', 'of', 'gammaray', 'bursts', 'within', 'few', 'minutes', 'from', 'the', 'trigger', 'and', 'in', 'identifying', 'opticalnir', 'isotropic', 'emissions', 'such', 'as', 'kilonovae']] | [-0.12134342323517121, 0.11153893520679072, -0.024975417842027507, 0.12164002167992294, -0.16373193054165266, -0.0052663665795345095, -0.003707967297751692, 0.3937471729196325, -0.20092762001684006, -0.32746723012503565, 0.09016786319427664, -0.31602687824847575, -0.09685579770468647, 0.22648390167381002, 0.04303032743650241, 0.013977976781139267, 0.07463050346019902, 0.010673173891875562, -0.033670094577430545, -0.19173245443196235, 0.26682726600018764, 0.19800269379740273, 0.19744910034527885, 0.003819229543987143, 0.052908620761731, 0.015886462983215534, -0.12047053203340384, -0.095731809310898, -0.049108055072447546, 0.054887205079386506, 0.2865940956516734, 0.19373404667889582, 0.25398287427010413, -0.41852288476273986, -0.24491730662463587, 0.13857202214495384, 0.11415590137343476, 0.035533502768678, -0.043596414130039604, -0.3878926064088186, 0.03210668961953702, -0.1836860542999038, -0.1806897785090193, 0.05950828331605166, 0.06278540182393044, 0.08331217337989166, -0.14378199917470588, 0.06044622510082171, 0.013614021005887019, -0.010366211492049544, -0.12677901137997455, 0.017202200261946722, 0.022821067089710056, 0.11999447332530082, 0.11597628626070587, 0.11301795273571263, 0.10411664007137282, -0.2435562538684499, -0.12597761675126, 0.44559584229099974, -0.05508686360443318, -0.031068133791507798, 0.17319716668770282, -0.1962889742247666, -0.16596923379486875, 0.21887570897801012, 0.1870447941171595, 0.08105676459690815, -0.1856431724338592, -0.0015137069107068679, 0.08951947081257895, 0.15674799350620824, 0.05610752241579887, 0.14269146538940788, 0.3529336758523802, 0.1715952275126371, 0.02151499732244241, 0.1377935762711671, -0.22172545671722368, 0.023760936374752486, -0.34409576313735185, -0.15214857441384957, -0.17559053167800973, 0.10829928920632287, -0.0439278179907853, -0.1462282526367226, 0.4298790650843065, 0.16095562690067328, 0.06832131339072049, -0.020807630344164333, 0.25989779431219623, 0.09988099421062094, 0.057723557479278764, 0.06649494028496969, 0.42473187670111656, 0.11546962249278432, 0.13561016912395252, -0.17203477475073048, 0.08213298480745547, -0.009295378086640488] |
1,802.01688 | GRB follow-up and science with THESEUS/IRT | The aim of the space mission concept \theseus~is to continue to collect and
study the GRB events like \swift. It will allow us to study the early Universe.
Moreover, it will offer us to study with unprecedented sensitivity GRB emission
and to measure the redshift for the bursts with $z>5$. In this work, we
investigate the advantages of a optical and near-infrared telescope mounted on
the same satellite that is triggered by the GRB like \theseus/IRT. Afterwards,
we investigate the possible future developments in the GRB science, first for
the prompt phase and the for afterglow phase. We find that more than half of
the sources detected by \theseus, and will never be visible from a a
ground-based telescope. Moreover, only $\sim50\%$ of all observable sources are
visible within one hour, i.e. $<30\%$ of all \theseus~transient sources. A
higher number of observable sources can only be achieved with a network of
telescopes. \theseus~will permit to detect the NIR prompt phase of the longest
GRBs, increasing the number of events studied from gamma-rays to the
near-infrared from a handful of events studied up to now to $\gtrsim10$ GRBs
per year.
| astro-ph.IM | the aim of the space mission concept theseusis to continue to collect and study the grb events like swift it will allow us to study the early universe moreover it will offer us to study with unprecedented sensitivity grb emission and to measure the redshift for the bursts with z5 in this work we investigate the advantages of a optical and nearinfrared telescope mounted on the same satellite that is triggered by the grb like theseusirt afterwards we investigate the possible future developments in the grb science first for the prompt phase and the for afterglow phase we find that more than half of the sources detected by theseus and will never be visible from a a groundbased telescope moreover only sim50 of all observable sources are visible within one hour ie 30 of all theseustransient sources a higher number of observable sources can only be achieved with a network of telescopes theseuswill permit to detect the nir prompt phase of the longest grbs increasing the number of events studied from gammarays to the nearinfrared from a handful of events studied up to now to gtrsim10 grbs per year | [['the', 'aim', 'of', 'the', 'space', 'mission', 'concept', 'theseusis', 'to', 'continue', 'to', 'collect', 'and', 'study', 'the', 'grb', 'events', 'like', 'swift', 'it', 'will', 'allow', 'us', 'to', 'study', 'the', 'early', 'universe', 'moreover', 'it', 'will', 'offer', 'us', 'to', 'study', 'with', 'unprecedented', 'sensitivity', 'grb', 'emission', 'and', 'to', 'measure', 'the', 'redshift', 'for', 'the', 'bursts', 'with', 'z5', 'in', 'this', 'work', 'we', 'investigate', 'the', 'advantages', 'of', 'a', 'optical', 'and', 'nearinfrared', 'telescope', 'mounted', 'on', 'the', 'same', 'satellite', 'that', 'is', 'triggered', 'by', 'the', 'grb', 'like', 'theseusirt', 'afterwards', 'we', 'investigate', 'the', 'possible', 'future', 'developments', 'in', 'the', 'grb', 'science', 'first', 'for', 'the', 'prompt', 'phase', 'and', 'the', 'for', 'afterglow', 'phase', 'we', 'find', 'that', 'more', 'than', 'half', 'of', 'the', 'sources', 'detected', 'by', 'theseus', 'and', 'will', 'never', 'be', 'visible', 'from', 'a', 'a', 'groundbased', 'telescope', 'moreover', 'only', 'sim50', 'of', 'all', 'observable', 'sources', 'are', 'visible', 'within', 'one', 'hour', 'ie', '30', 'of', 'all', 'theseustransient', 'sources', 'a', 'higher', 'number', 'of', 'observable', 'sources', 'can', 'only', 'be', 'achieved', 'with', 'a', 'network', 'of', 'telescopes', 'theseuswill', 'permit', 'to', 'detect', 'the', 'nir', 'prompt', 'phase', 'of', 'the', 'longest', 'grbs', 'increasing', 'the', 'number', 'of', 'events', 'studied', 'from', 'gammarays', 'to', 'the', 'nearinfrared', 'from', 'a', 'handful', 'of', 'events', 'studied', 'up', 'to', 'now', 'to', 'gtrsim10', 'grbs', 'per', 'year']] | [-0.0526829331466689, 0.1661923619289253, -0.06455679789588258, 0.11021705253074902, -0.1290418963766078, -0.08016507756468412, 0.07763406692727191, 0.4396449239270107, -0.1875363526375008, -0.33853871310633177, 0.0954385846903598, -0.34448184828601175, -0.0445660685465948, 0.2603742537214547, -0.020909915104936304, -0.007979501889565506, 0.10126188363426843, -0.04491565471791939, -0.046253093497786744, -0.27284320800288303, 0.251067740770963, 0.13110488027938313, 0.18855379479748474, -0.013379593900203504, 0.10608344715264802, -0.04550275377224426, -0.08364171307735346, -0.021839919984120423, -0.11624910495947179, 0.06778684521496699, 0.25766482891363873, 0.1605864892864751, 0.2370961144516194, -0.3944756621947965, -0.22958652530670973, 0.15900118626100387, 0.12465247634445896, 0.024234631053499274, -0.0014409360297282252, -0.31041633041097305, 0.0734247488331528, -0.19501750812286864, -0.16946572416235467, 0.03750443658602701, 0.01561029191456131, 0.042242276340068594, -0.16099308074449623, 0.014910361080153568, -0.03993088749073748, 0.021041566825069084, -0.06601323848590254, 0.011310364225426237, -0.008149572850733592, 0.10794862918555737, 0.046002713061013334, 0.06835351270321455, 0.07252735173128344, -0.13864438586515954, -0.07677134177773386, 0.4120237444124713, -0.06800548366083752, 0.03273148459659235, 0.17940504677543367, -0.2516937014722341, -0.18364827384719173, 0.16501195032426433, 0.17565146304062895, 0.1103961672910766, -0.18106654257689778, -0.02553640180298857, 0.04015498252434505, 0.20968984988945963, 0.03925464075637629, 0.11695108405767461, 0.27172959627885673, 0.1582765222250207, 0.06724895878216705, 0.13046280672094104, -0.23120871369122856, 0.01752737561473623, -0.2969901259189371, -0.16463344691296083, -0.1507207735756261, 0.10410872740368989, -0.041743590088318905, -0.07936064138933009, 0.4291342853870545, 0.1824814332825308, 0.18668759173738794, 0.04933688294683659, 0.28380532697648614, 0.03545611875282752, 0.1150136758604817, 0.039674099442876275, 0.3504473582916969, 0.05865514543461236, 0.13542277095335964, -0.15027888524849473, 0.05915869751290695, -0.011441237090558217] |
1,802.01689 | Gamma-ray bursts as tracers of star-formation rate and metallicity
evolution with THESEUS | The class of long gamma-ray bursts (LGRBs) is associated with the collapse of
the most massive stars, making them a tool to investigate star formation in the
early Universe. Furthermore, thanks to their exceptional brightness, LGRB
afterglows can be used as extra-galactic background sources capable of
unveiling the properties of the cold/warm gas of their hosting galaxies, up to
the highest redshifts. Therefore LGRBs allow, uniquely, the combination of the
information on different phases of the gas, through the absorption lines
present in the afterglow spectra and the emission (continuum and lines)
properties obtained from host galaxy photometry and spectroscopy, once the
afterglow disappeared. To date, the main problem to carry out this kind of
studies at very high redshift is the poor number of GRBs detected at $z>5$. The
THESEUS mission will hugely increase such number, as it is expected to detect
$>100$ GRBs at $z>5$. Therefore, THESEUS will bring a unique and fundamental
contribution to the understanding of the chemical enrichment of the universe
and of the evolution of galaxies and star formation up to the highest redshift.
| astro-ph.HE | the class of long gammaray bursts lgrbs is associated with the collapse of the most massive stars making them a tool to investigate star formation in the early universe furthermore thanks to their exceptional brightness lgrb afterglows can be used as extragalactic background sources capable of unveiling the properties of the coldwarm gas of their hosting galaxies up to the highest redshifts therefore lgrbs allow uniquely the combination of the information on different phases of the gas through the absorption lines present in the afterglow spectra and the emission continuum and lines properties obtained from host galaxy photometry and spectroscopy once the afterglow disappeared to date the main problem to carry out this kind of studies at very high redshift is the poor number of grbs detected at z5 the theseus mission will hugely increase such number as it is expected to detect 100 grbs at z5 therefore theseus will bring a unique and fundamental contribution to the understanding of the chemical enrichment of the universe and of the evolution of galaxies and star formation up to the highest redshift | [['the', 'class', 'of', 'long', 'gammaray', 'bursts', 'lgrbs', 'is', 'associated', 'with', 'the', 'collapse', 'of', 'the', 'most', 'massive', 'stars', 'making', 'them', 'a', 'tool', 'to', 'investigate', 'star', 'formation', 'in', 'the', 'early', 'universe', 'furthermore', 'thanks', 'to', 'their', 'exceptional', 'brightness', 'lgrb', 'afterglows', 'can', 'be', 'used', 'as', 'extragalactic', 'background', 'sources', 'capable', 'of', 'unveiling', 'the', 'properties', 'of', 'the', 'coldwarm', 'gas', 'of', 'their', 'hosting', 'galaxies', 'up', 'to', 'the', 'highest', 'redshifts', 'therefore', 'lgrbs', 'allow', 'uniquely', 'the', 'combination', 'of', 'the', 'information', 'on', 'different', 'phases', 'of', 'the', 'gas', 'through', 'the', 'absorption', 'lines', 'present', 'in', 'the', 'afterglow', 'spectra', 'and', 'the', 'emission', 'continuum', 'and', 'lines', 'properties', 'obtained', 'from', 'host', 'galaxy', 'photometry', 'and', 'spectroscopy', 'once', 'the', 'afterglow', 'disappeared', 'to', 'date', 'the', 'main', 'problem', 'to', 'carry', 'out', 'this', 'kind', 'of', 'studies', 'at', 'very', 'high', 'redshift', 'is', 'the', 'poor', 'number', 'of', 'grbs', 'detected', 'at', 'z5', 'the', 'theseus', 'mission', 'will', 'hugely', 'increase', 'such', 'number', 'as', 'it', 'is', 'expected', 'to', 'detect', '100', 'grbs', 'at', 'z5', 'therefore', 'theseus', 'will', 'bring', 'a', 'unique', 'and', 'fundamental', 'contribution', 'to', 'the', 'understanding', 'of', 'the', 'chemical', 'enrichment', 'of', 'the', 'universe', 'and', 'of', 'the', 'evolution', 'of', 'galaxies', 'and', 'star', 'formation', 'up', 'to', 'the', 'highest', 'redshift']] | [-0.04337000312112246, 0.10233035892920775, -0.07237443917482678, 0.1274116963686538, -0.12368063121620151, -0.044820602584837214, 0.07159260569217925, 0.42130005941208865, -0.17988526487477227, -0.3476411695281664, 0.05299865930153626, -0.3261757374327216, -0.005071731012624999, 0.2031676826170749, 0.02751830319304847, -0.02553324082077274, 0.051621175340066355, -0.0813701372865277, -0.04101819759865369, -0.3174882588494155, 0.29783051470941346, 0.153084009903897, 0.20693730611302372, -0.009050454443786294, 0.08133917980546054, -0.11507378001956062, -0.09001982406221537, -0.05265460741809673, -0.13824879541967272, 0.03671733648192862, 0.2787853654952616, 0.15168089860688067, 0.22873932316433637, -0.346386877188666, -0.23180585723473793, 0.12438760254687319, 0.18425060137071544, 0.05381333305138267, -0.0548742710871415, -0.2727403382706042, 0.07885483637073776, -0.16224954868666827, -0.20204669119039964, 0.04322659383243364, 0.015544673919470774, 0.050073767794917026, -0.14335224330376756, 0.09042507210591187, -0.010519276752084908, 0.03739661805383447, -0.0653351520278698, -0.004654652051006754, -0.054704352501883276, 0.11572517080801642, 0.05084007617939885, 0.06261465221113112, 0.14499360528878039, -0.18790515212264533, -0.026560599175799223, 0.4584792795487576, -0.05602125720017486, 0.051971007376495335, 0.2567284343026889, -0.22394165484527345, -0.2031047737820902, 0.17203200029260995, 0.1479908363880693, 0.08698332452525695, -0.1702546648422463, -0.025532022170955314, 0.06475006464558343, 0.17353942733283878, 0.02165197264403105, 0.12416409958782929, 0.36908370332999363, 0.1331346666983639, 0.023990004835650326, 0.08935406644983838, -0.18753172330762027, 0.03918465255604436, -0.26102027265199773, -0.14784244524004558, -0.1549151112842891, 0.1340746400024121, -0.10903076386651568, -0.12538830236007925, 0.400535807846528, 0.12093302351875335, 0.1789699375655295, 0.05757837790944096, 0.2599408231675625, 0.057796625889669585, 0.1072052805710377, 0.07419146985565829, 0.3218138639608191, 0.16236626299149876, 0.0961704096414097, -0.23703657023531075, 0.10302890729055636, -0.007508899986795667] |
1,802.0169 | Role of THESEUS in Understanding the Radiation Mechanism of GRB Prompt
Emission | The radiation process of GRB prompt emission remains highly debated till
date. Though a smoothly broken powerlaw function like Band provides an
excellent fit to most of the cases, a spectrum with a broad top or double hump
structure has emerged recently for several GRBs, specifically for the bright
ones that have high signal to noise data. A number of models have been proposed
to capture this shape which includes an additional blackbody component along
with the Band, or a double smoothly broken powerlaw, or two blackbodies with a
powerlaw/cut-off powerlaw and so on. However, finding the statistically
favourable model has not always been possible primarily due to the limited
resolution of GRB detectors. Recently, we have identified a number of
interesting cases where an observation with focusing detectors are available at
a later part of the prompt emission. Their high resolution data helped in
identifying additional spectral component (a blackbody) in lower energies. The
proposed THESEUS mission, with its unprecedented sensitivity and spectral
resolution available from the very beginning of the prompt emission holds the
key to identify the correct spectral model and thereby the radiation process.
| astro-ph.HE | the radiation process of grb prompt emission remains highly debated till date though a smoothly broken powerlaw function like band provides an excellent fit to most of the cases a spectrum with a broad top or double hump structure has emerged recently for several grbs specifically for the bright ones that have high signal to noise data a number of models have been proposed to capture this shape which includes an additional blackbody component along with the band or a double smoothly broken powerlaw or two blackbodies with a powerlawcutoff powerlaw and so on however finding the statistically favourable model has not always been possible primarily due to the limited resolution of grb detectors recently we have identified a number of interesting cases where an observation with focusing detectors are available at a later part of the prompt emission their high resolution data helped in identifying additional spectral component a blackbody in lower energies the proposed theseus mission with its unprecedented sensitivity and spectral resolution available from the very beginning of the prompt emission holds the key to identify the correct spectral model and thereby the radiation process | [['the', 'radiation', 'process', 'of', 'grb', 'prompt', 'emission', 'remains', 'highly', 'debated', 'till', 'date', 'though', 'a', 'smoothly', 'broken', 'powerlaw', 'function', 'like', 'band', 'provides', 'an', 'excellent', 'fit', 'to', 'most', 'of', 'the', 'cases', 'a', 'spectrum', 'with', 'a', 'broad', 'top', 'or', 'double', 'hump', 'structure', 'has', 'emerged', 'recently', 'for', 'several', 'grbs', 'specifically', 'for', 'the', 'bright', 'ones', 'that', 'have', 'high', 'signal', 'to', 'noise', 'data', 'a', 'number', 'of', 'models', 'have', 'been', 'proposed', 'to', 'capture', 'this', 'shape', 'which', 'includes', 'an', 'additional', 'blackbody', 'component', 'along', 'with', 'the', 'band', 'or', 'a', 'double', 'smoothly', 'broken', 'powerlaw', 'or', 'two', 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1,802.01691 | Observing strategy of the THESEUS mission | We will discuss the observing strategy of the Transient High Energy Sky and
Early Universe Surveyor (THESEUS) mission proposed to ESA as a response to the
M5 call for proposals. The description of THESEUS and its science goals can be
found in the white paper by Amati et al. (2017).
| astro-ph.HE | we will discuss the observing strategy of the transient high energy sky and early universe surveyor theseus mission proposed to esa as a response to the m5 call for proposals the description of theseus and its science goals can be found in the white paper by amati et al 2017 | [['we', 'will', 'discuss', 'the', 'observing', 'strategy', 'of', 'the', 'transient', 'high', 'energy', 'sky', 'and', 'early', 'universe', 'surveyor', 'theseus', 'mission', 'proposed', 'to', 'esa', 'as', 'a', 'response', 'to', 'the', 'm5', 'call', 'for', 'proposals', 'the', 'description', 'of', 'theseus', 'and', 'its', 'science', 'goals', 'can', 'be', 'found', 'in', 'the', 'white', 'paper', 'by', 'amati', 'et', 'al', '2017']] | [-0.06269660295918583, 0.12159364862367511, -0.12499750691466033, 0.08331679234281182, -0.1357738498598337, -0.022983849924057723, 0.015063896051142365, 0.3224962351098657, -0.17033048546873034, -0.44601399183738977, 0.09802461884682998, -0.2952358550019562, -0.17682947598397733, 0.20369080124422909, -0.17455513766035438, 0.00842129925149493, 0.04403459645807743, -0.09687461349298246, 0.0029620400629937647, -0.34736981995403765, 0.22771766941994429, 0.2675694130733609, 0.25982807860244067, -0.057566127963364126, 0.10590153984725476, -0.027264205743558704, -0.1045107102394104, 0.0009684348851442337, -0.1870566614344716, 0.04842199005186558, 0.31345836460590365, 0.24785998987033964, 0.2541477283835411, -0.3699990935623646, -0.20497637640684843, 0.09572841268964112, 0.060766360722482204, 0.034914739914238456, -0.01608958464115858, -0.3498493595421314, 0.020877195205539465, -0.2282437490299344, -0.16390713072381913, -0.054007075550034644, 0.08977423802018165, 0.030021880734711886, -0.22055285851471126, 0.0041767675057053566, 0.027008566781878473, -0.04330739798955619, -0.13339890722418205, -0.04536727998405695, -0.016167315673083067, 0.07651672883890569, -0.016884325535502284, 0.07827290444634855, 0.06882147525437177, -0.14235498746857048, -0.13274436574429274, 0.3973933279060293, -0.07887354761362075, 0.07968856547260657, 0.15321494206786157, -0.14691867063753306, -0.17533714590594174, 0.011972208158113062, 0.16109652418643236, 0.07238287553191185, -0.19335623206570746, 0.09877339116996155, 0.0665794406645, 0.13810561834834517, 0.07096975998952985, 0.06945175029337407, 0.3050571196526289, 0.19302416337653994, 0.08373763709329068, 0.0994865277572535, -0.18955615622457117, 0.018997566740727053, -0.31043793516233564, -0.15863988066790624, -0.1792163353227079, 0.012449753656983375, 0.008693238816340454, -0.060007335245609285, 0.41029288006946446, 0.17437405127100647, 0.10928478177404032, -0.024229216794483362, 0.2751932979375124, 0.006138955520000309, -0.002861318029463291, 0.058071370129473505, 0.33232131782453506, 0.01500560608226806, 0.18237462989985942, -0.18582285427488388, 0.01802650694735348, 0.07086416310165078] |
1,802.01692 | Gravitational Waves optical follow-up at VST | We report on the deep optical follow-up surveys of the first two
gravitational-wave events, GW150914 and GW151226, accomplished by the
GRAvitational Wave Inaf TeAm Collaboration (GRAWITA) using the VLT Survey
Telescope (VST). We responded promptly to the gravitational-wave alerts sent by
the LIGO and Virgo Collaborations, covering a region of $90$ deg$^2$ and $72$
deg$^2$ for GW150914 and GW151226, respectively, and kept observing the two
areas over nearly two months. Both surveys reached an average limiting
magnitude of about 21 in the $r-$band. The paper outlines the VST observational
strategy and two independent procedures developed to search for transient
counterpart candidates in multi-epoch VST images. Numerous transients have been
discovered, mostly variable stars and eclipsing binaries, but no candidates are
identified as related to the gravitational-wave events. The work done let on to
gain experience and tune the tools for next LVC runs and in general to exploit
the synergies between wide field optical surveys and future multi-messenger
programs including projects like Theseus.
| astro-ph.IM | we report on the deep optical followup surveys of the first two gravitationalwave events gw150914 and gw151226 accomplished by the gravitational wave inaf team collaboration grawita using the vlt survey telescope vst we responded promptly to the gravitationalwave alerts sent by the ligo and virgo collaborations covering a region of 90 deg2 and 72 deg2 for gw150914 and gw151226 respectively and kept observing the two areas over nearly two months both surveys reached an average limiting magnitude of about 21 in the rband the paper outlines the vst observational strategy and two independent procedures developed to search for transient counterpart candidates in multiepoch vst images numerous transients have been discovered mostly variable stars and eclipsing binaries but no candidates are identified as related to the gravitationalwave events the work done let on to gain experience and tune the tools for next lvc runs and in general to exploit the synergies between wide field optical surveys and future multimessenger programs including projects like theseus | [['we', 'report', 'on', 'the', 'deep', 'optical', 'followup', 'surveys', 'of', 'the', 'first', 'two', 'gravitationalwave', 'events', 'gw150914', 'and', 'gw151226', 'accomplished', 'by', 'the', 'gravitational', 'wave', 'inaf', 'team', 'collaboration', 'grawita', 'using', 'the', 'vlt', 'survey', 'telescope', 'vst', 'we', 'responded', 'promptly', 'to', 'the', 'gravitationalwave', 'alerts', 'sent', 'by', 'the', 'ligo', 'and', 'virgo', 'collaborations', 'covering', 'a', 'region', 'of', '90', 'deg2', 'and', '72', 'deg2', 'for', 'gw150914', 'and', 'gw151226', 'respectively', 'and', 'kept', 'observing', 'the', 'two', 'areas', 'over', 'nearly', 'two', 'months', 'both', 'surveys', 'reached', 'an', 'average', 'limiting', 'magnitude', 'of', 'about', '21', 'in', 'the', 'rband', 'the', 'paper', 'outlines', 'the', 'vst', 'observational', 'strategy', 'and', 'two', 'independent', 'procedures', 'developed', 'to', 'search', 'for', 'transient', 'counterpart', 'candidates', 'in', 'multiepoch', 'vst', 'images', 'numerous', 'transients', 'have', 'been', 'discovered', 'mostly', 'variable', 'stars', 'and', 'eclipsing', 'binaries', 'but', 'no', 'candidates', 'are', 'identified', 'as', 'related', 'to', 'the', 'gravitationalwave', 'events', 'the', 'work', 'done', 'let', 'on', 'to', 'gain', 'experience', 'and', 'tune', 'the', 'tools', 'for', 'next', 'lvc', 'runs', 'and', 'in', 'general', 'to', 'exploit', 'the', 'synergies', 'between', 'wide', 'field', 'optical', 'surveys', 'and', 'future', 'multimessenger', 'programs', 'including', 'projects', 'like', 'theseus']] | [-0.12583113569668553, 0.08353497779342119, -0.03729248234936048, 0.10488688867010268, -0.16244466744512778, -0.07374137939229884, 0.07707064085493416, 0.40597836230594064, -0.1426174734333921, -0.3810582514205534, 0.1456961666038375, -0.36960671444848914, -0.086833454148246, 0.27226482318961465, 0.01957049782306709, 0.0388885199162034, 0.13933953128605622, -0.09862878966938567, -0.03194667906557888, -0.338898148215922, 0.22491308755563272, 0.13362661366085782, 0.18703226021090005, -0.08573242298321637, 0.10939581387814272, 0.01998157123172725, -0.18038793032368025, -0.03666539869794369, -0.14744261891080246, 0.022600986040484758, 0.34142253778294235, 0.2265500146525112, 0.28536618622249843, -0.3540030951672061, -0.15642099372717772, 0.09538287137359104, 0.14179284810548487, 0.013302004229231381, -0.023565791129065608, -0.42896829985864, 0.04618272482651792, -0.21427058488889425, -0.13265838436954827, 0.023297223828755962, 0.06467216780889251, 0.06108240960855727, -0.1832385097204903, -0.0033242175791033165, -0.058686584951413545, 0.08420685055539195, -0.12656368538421106, -0.10248571652904681, 0.023034160934463373, 0.08872228230200248, 0.01848211079723788, 0.12649224690423222, 0.11030693928262701, -0.17486918437219925, -0.15152559709953672, 0.3174230956162016, -0.08418126831716502, 0.010644410210834057, 0.1807880715379365, -0.1901050245685411, -0.19309385281550573, 0.11316527492570817, 0.22582241901437994, 0.101800127386081, -0.22495832044148334, -0.004177612497580502, 0.08622996913807045, 0.2082973516655419, 0.10643140248699907, 0.08193435237770268, 0.3430866625269208, 0.13760659127369707, 0.07214615561993631, 0.10004268764276747, -0.26758789531829086, 0.010500474571376855, -0.2544436807497002, -0.07680495371064747, -0.12416459373370917, 0.047449194720100445, -0.03896445570492766, -0.054636772377071555, 0.3907207030641996, 0.1442622427345702, 0.09991078744038802, 0.0262283275657, 0.28082786735584153, 0.002361566357222604, 0.09661715975847601, 0.04661980921827993, 0.3984675090127613, 0.08485987422740615, 0.15637885819312852, -0.11446750790087713, 0.01480151728991373, -0.028463560959394663] |
1,802.01693 | Revisiting the Statistics of X-ray Flares in Gamma-ray Bursts | The statistics of X-ray flares in the afterglow of gamma-ray bursts (GRBs)
have been studied extensively without considering the possible different
origins of each flare. By satisfying six observational criteria, we find a
sample composed of $16$ long GRBs observed by \textit{Swift} satellite may
share a same origin. By applying the Markov chain Monte Carlo iteration and the
machine learning algorithms (locally weighted regression and Gaussian process
regression), impressively, the flares in these GRBs show strong correlations
with the energy released in the prompt emission. These correlations were never
discovered in previous papers, and they could not be well explained by previous
models. These correlations imply that the prompt emission and the X-ray flare
are not independent, they may be originated following a same sequence. The new
THESUS satellite will provide us a larger sample and more detailed spectra to
refine the results we obtained in this article.
| astro-ph.HE | the statistics of xray flares in the afterglow of gammaray bursts grbs have been studied extensively without considering the possible different origins of each flare by satisfying six observational criteria we find a sample composed of 16 long grbs observed by textitswift satellite may share a same origin by applying the markov chain monte carlo iteration and the machine learning algorithms locally weighted regression and gaussian process regression impressively the flares in these grbs show strong correlations with the energy released in the prompt emission these correlations were never discovered in previous papers and they could not be well explained by previous models these correlations imply that the prompt emission and the xray flare are not independent they may be originated following a same sequence the new thesus satellite will provide us a larger sample and more detailed spectra to refine the results we obtained in this article | [['the', 'statistics', 'of', 'xray', 'flares', 'in', 'the', 'afterglow', 'of', 'gammaray', 'bursts', 'grbs', 'have', 'been', 'studied', 'extensively', 'without', 'considering', 'the', 'possible', 'different', 'origins', 'of', 'each', 'flare', 'by', 'satisfying', 'six', 'observational', 'criteria', 'we', 'find', 'a', 'sample', 'composed', 'of', '16', 'long', 'grbs', 'observed', 'by', 'textitswift', 'satellite', 'may', 'share', 'a', 'same', 'origin', 'by', 'applying', 'the', 'markov', 'chain', 'monte', 'carlo', 'iteration', 'and', 'the', 'machine', 'learning', 'algorithms', 'locally', 'weighted', 'regression', 'and', 'gaussian', 'process', 'regression', 'impressively', 'the', 'flares', 'in', 'these', 'grbs', 'show', 'strong', 'correlations', 'with', 'the', 'energy', 'released', 'in', 'the', 'prompt', 'emission', 'these', 'correlations', 'were', 'never', 'discovered', 'in', 'previous', 'papers', 'and', 'they', 'could', 'not', 'be', 'well', 'explained', 'by', 'previous', 'models', 'these', 'correlations', 'imply', 'that', 'the', 'prompt', 'emission', 'and', 'the', 'xray', 'flare', 'are', 'not', 'independent', 'they', 'may', 'be', 'originated', 'following', 'a', 'same', 'sequence', 'the', 'new', 'thesus', 'satellite', 'will', 'provide', 'us', 'a', 'larger', 'sample', 'and', 'more', 'detailed', 'spectra', 'to', 'refine', 'the', 'results', 'we', 'obtained', 'in', 'this', 'article']] | [-0.04812069861202494, 0.15170866976409744, -0.09185009431188965, 0.19946844011296364, -0.08854941883105405, -0.11028830631363655, 0.033411096383145926, 0.4791570741708587, -0.22133672435064705, -0.3423822811190166, 0.06681558791924977, -0.31135029155051425, -0.05042012736556076, 0.23859342377708884, -0.032544244742844584, 0.0532030236066262, 0.11482248214140002, -0.06749507630395159, -0.060622742615377236, -0.3044223081903393, 0.2566727460092757, 0.10624846236045364, 0.22160775044364348, -0.038177723407137154, 0.043345479365932395, -0.024491972139510675, -0.09437169998466056, 0.004380658263384941, -0.11766104137416665, 0.05631916133091361, 0.2370541813354165, 0.14219482071719688, 0.24325843335313052, -0.41045110998308953, -0.2823202139349515, 0.13755509371039312, 0.17684502417196324, 0.024584956213730535, -0.017629630834067742, -0.30742340500080056, 0.05007004917862185, -0.18275685858244367, -0.08620004174077794, -0.0016000416734870398, -0.02050542823501489, 0.08410040702239997, -0.19180212046342845, 0.07630853491382306, 0.06157436402083761, 0.06169512641749212, -0.077411252846878, -0.06739885986111044, -0.0051790375854870695, 0.08480575494468212, 0.08663628940358853, 0.025750698141601622, 0.10076265274008521, -0.07286516776099344, -0.16348658688366413, 0.333621365379314, -0.034500784886886876, -0.02863077118638016, 0.20107026231557537, -0.2020828365823444, -0.23921744239066733, 0.15638844415444095, 0.128142798533481, 0.07377552078897451, -0.20460460440502787, -0.013916857659002626, -0.019117081981329692, 0.1526546543178966, 0.018924813754032967, 0.04321067747628304, 0.2449673505873755, 0.1076317071886163, -0.023784690129500973, 0.136247800724885, -0.1650722155499519, -0.021418213158874412, -0.2886585806730856, -0.09328009640848657, -0.18658491562209314, 0.08448643433615141, -0.07202521706469987, -0.12476292851564734, 0.39369522108930816, 0.11632472136257309, 0.21445608145373612, 0.04506312922707626, 0.23469014079341677, 0.10351351384219214, 0.08830040137397445, 0.11986578277749371, 0.31843478642689177, 0.09972865092187967, 0.11804926487914964, -0.15143021851695668, 0.1291371223320361, 0.02440778177142853] |
1,802.01694 | High redshift constraints on dark energy models from the $E_{\rm p,i}$
-- $E_{\rm iso}$ correlation in GRBs | Here we test different models of dark energy beyond the standard cosmological
constant scenario. We start considering the CPL parameterization of the
equation of state (EOS), then we consider a dark energy scalar field
(Quintessense). Finally we consider models with dark energy at early times
(EDE). Our analysis is based on the Union2 type Ia supernovae data set, a Gamma
Ray Bursts (GRBs) Hubble diagram, a set of 28 independent measurements of the
Hubble parameter, some baryon acoustic oscillations (BAO) measurements. We
performed a statistical analysis and explore the probability distributions of
the cosmological parameters for each of the competing models. To build up their
own regions of confidence, we maximize some appropriate likelihood functions
using the Markov chain Monte Carlo (MCMC) method. Our analysis indicates that
the EDE and the scalar field quintessence are slightly favored by the present
data. Moreover, the GRBs Hubble diagram alone is able to set the transition
region from the decelerated to the accelerated expansion of the Universe in all
the tested models. Perspectives for improvements in the field with the THESEUS
mission are also described.
| astro-ph.HE | here we test different models of dark energy beyond the standard cosmological constant scenario we start considering the cpl parameterization of the equation of state eos then we consider a dark energy scalar field quintessense finally we consider models with dark energy at early times ede our analysis is based on the union2 type ia supernovae data set a gamma ray bursts grbs hubble diagram a set of 28 independent measurements of the hubble parameter some baryon acoustic oscillations bao measurements we performed a statistical analysis and explore the probability distributions of the cosmological parameters for each of the competing models to build up their own regions of confidence we maximize some appropriate likelihood functions using the markov chain monte carlo mcmc method our analysis indicates that the ede and the scalar field quintessence are slightly favored by the present data moreover the grbs hubble diagram alone is able to set the transition region from the decelerated to the accelerated expansion of the universe in all the tested models perspectives for improvements in the field with the theseus mission are also described | [['here', 'we', 'test', 'different', 'models', 'of', 'dark', 'energy', 'beyond', 'the', 'standard', 'cosmological', 'constant', 'scenario', 'we', 'start', 'considering', 'the', 'cpl', 'parameterization', 'of', 'the', 'equation', 'of', 'state', 'eos', 'then', 'we', 'consider', 'a', 'dark', 'energy', 'scalar', 'field', 'quintessense', 'finally', 'we', 'consider', 'models', 'with', 'dark', 'energy', 'at', 'early', 'times', 'ede', 'our', 'analysis', 'is', 'based', 'on', 'the', 'union2', 'type', 'ia', 'supernovae', 'data', 'set', 'a', 'gamma', 'ray', 'bursts', 'grbs', 'hubble', 'diagram', 'a', 'set', 'of', '28', 'independent', 'measurements', 'of', 'the', 'hubble', 'parameter', 'some', 'baryon', 'acoustic', 'oscillations', 'bao', 'measurements', 'we', 'performed', 'a', 'statistical', 'analysis', 'and', 'explore', 'the', 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1,802.01695 | On the PDS of GRB light curves | In spite of the complicated behavior in the time domain, long GRBs show a
simpler behavior in the Fourier domain of frequencies, represented by power
density spectra, PDS. Recently, there are some relations found between GRBs
properties and PDS parameters, modeled by power-laws. Among them, the
correlation between peak energy $E_{peak}$ and PDS slope $\alpha$ shows a clear
evidence. In this work we try to understand the origin of this correlation,
making use of synthetic pulses. We find some preliminary evidences that
$E_{peak}-\alpha$ relation can be seen as a new confirmation of the empiric
relations $E_{peak}-L$ and $t_{p}-L$ for GRBs.
| astro-ph.IM | in spite of the complicated behavior in the time domain long grbs show a simpler behavior in the fourier domain of frequencies represented by power density spectra pds recently there are some relations found between grbs properties and pds parameters modeled by powerlaws among them the correlation between peak energy e_peak and pds slope alpha shows a clear evidence in this work we try to understand the origin of this correlation making use of synthetic pulses we find some preliminary evidences that e_peakalpha relation can be seen as a new confirmation of the empiric relations e_peakl and t_pl for grbs | [['in', 'spite', 'of', 'the', 'complicated', 'behavior', 'in', 'the', 'time', 'domain', 'long', 'grbs', 'show', 'a', 'simpler', 'behavior', 'in', 'the', 'fourier', 'domain', 'of', 'frequencies', 'represented', 'by', 'power', 'density', 'spectra', 'pds', 'recently', 'there', 'are', 'some', 'relations', 'found', 'between', 'grbs', 'properties', 'and', 'pds', 'parameters', 'modeled', 'by', 'powerlaws', 'among', 'them', 'the', 'correlation', 'between', 'peak', 'energy', 'e_peak', 'and', 'pds', 'slope', 'alpha', 'shows', 'a', 'clear', 'evidence', 'in', 'this', 'work', 'we', 'try', 'to', 'understand', 'the', 'origin', 'of', 'this', 'correlation', 'making', 'use', 'of', 'synthetic', 'pulses', 'we', 'find', 'some', 'preliminary', 'evidences', 'that', 'e_peakalpha', 'relation', 'can', 'be', 'seen', 'as', 'a', 'new', 'confirmation', 'of', 'the', 'empiric', 'relations', 'e_peakl', 'and', 't_pl', 'for', 'grbs']] | [-0.10951878542878798, 0.09808945966045829, -0.11967577590911212, 0.17494560250470756, -0.08329627277063471, -0.08028300363589458, 0.07697210344010774, 0.47002218123905515, -0.22523820942608705, -0.33811347486869414, 0.019696785507685676, -0.3031594395561486, -0.15222086091240755, 0.22107350888034824, 0.004643710662743875, 0.01964950432278672, 0.0248564075517031, -0.03308961106160162, -0.08993255937405463, -0.13880951699268604, 0.2725388186660652, 0.0599401770349668, 0.25325772394331136, 0.0036569815509173336, 0.0310784618664837, -0.04412836204900653, -0.07040322036482394, 0.03464773578607306, -0.13445636791888949, 0.05196152153729024, 0.2552769389003515, 0.09458715945710333, 0.2348954896537625, -0.3891283992525874, -0.24758799144242682, 0.12292091573626564, 0.150764853584257, -0.007062554102847163, -0.0491811167852649, -0.24031615884480428, 0.024075377993855854, -0.15994660090655088, -0.15668850505192364, -0.06308687056357763, 0.09220750915000633, 0.07690626800972589, -0.20600686423784617, 0.13380657619563863, 0.0533535751913275, 0.0814311200353716, -0.061094810558977176, -0.06397638434772285, 0.002253638235947155, 0.11431624931615911, 0.12010344684038464, -0.018164750635837754, 0.030784822240167736, -0.12710850985663735, -0.09992146407306308, 0.3592121245491566, -0.05649238764736041, -0.0760999272330379, 0.17714170391234207, -0.17813152354210615, -0.16644170981527742, 0.08750326739866476, 0.09830020315831109, 0.05316473865330371, -0.14504140086129916, 0.010599873235986131, -0.028939088810073704, 0.2594990676069366, 0.07172820997681012, 0.08488081080591953, 0.24316352594415752, 0.12642126780820592, -0.024185198691806624, 0.13876815812011267, -0.09248364045627995, -0.031095233541552206, -0.2888733125648138, -0.11514356654441478, -0.17870593247507527, 0.07183824985155038, -0.09735503468655966, -0.10786344197445683, 0.40658890204124, 0.11308559140057436, 0.25726031337161454, 0.09063341184424198, 0.2329911995318015, 0.16159661076083892, 0.06359566358507288, 0.1023292656256152, 0.2791749998168041, 0.10770580893363424, 0.1256441312024788, -0.2011493731489671, 0.09406458384509446, -0.009724969882993218] |
1,802.01696 | A multi-messenger analysis of neutron star mergers | The merger of two neutron stars is a very complex process. In order to
disentangle the various steps through which it takes place it is mandatory to
examine all the signals we can detect: gravitational waves and electromagnetic
waves, in a huge spectrum ranging from X and $\gamma$-rays down to infrared and
radio. Each of these signals provides a message and the totality of this
information will allow us not only to understand the process of the merger but
also the behavior of matter at those extreme conditions.
| astro-ph.HE | the merger of two neutron stars is a very complex process in order to disentangle the various steps through which it takes place it is mandatory to examine all the signals we can detect gravitational waves and electromagnetic waves in a huge spectrum ranging from x and gammarays down to infrared and radio each of these signals provides a message and the totality of this information will allow us not only to understand the process of the merger but also the behavior of matter at those extreme conditions | [['the', 'merger', 'of', 'two', 'neutron', 'stars', 'is', 'a', 'very', 'complex', 'process', 'in', 'order', 'to', 'disentangle', 'the', 'various', 'steps', 'through', 'which', 'it', 'takes', 'place', 'it', 'is', 'mandatory', 'to', 'examine', 'all', 'the', 'signals', 'we', 'can', 'detect', 'gravitational', 'waves', 'and', 'electromagnetic', 'waves', 'in', 'a', 'huge', 'spectrum', 'ranging', 'from', 'x', 'and', 'gammarays', 'down', 'to', 'infrared', 'and', 'radio', 'each', 'of', 'these', 'signals', 'provides', 'a', 'message', 'and', 'the', 'totality', 'of', 'this', 'information', 'will', 'allow', 'us', 'not', 'only', 'to', 'understand', 'the', 'process', 'of', 'the', 'merger', 'but', 'also', 'the', 'behavior', 'of', 'matter', 'at', 'those', 'extreme', 'conditions']] | [-0.10993060171743062, 0.1316948828012259, -0.13647437207294966, 0.1104125859964039, -0.14937892885592935, -0.06093689764913341, 0.04944540264973925, 0.3700746962091547, -0.2517084874297408, -0.3100818764862858, 0.10655591204307381, -0.2983263654112472, -0.09037713636511895, 0.19449492081184871, 0.012694850442296063, -0.008776190568989312, 0.035436093542640185, 0.04475093213576739, -0.03214744174461388, -0.21246464225722858, 0.30525385634973645, 0.07179620229131119, 0.2049024369334802, 0.03193188774060796, 0.1163007382684472, -0.025706397480627693, -0.0559239527951418, -0.06070305225809782, -0.07941279049158435, 0.04509230807360092, 0.2904586579375477, 0.16041898714386413, 0.20726843601563483, -0.456565722674978, -0.22504455365494572, 0.13578013949815862, 0.12818971024667422, 0.11982616573037706, -0.00850033446807753, -0.27964831655845046, 0.09902723586525429, -0.15886422381101345, -0.09477983908304437, -0.027119363816878336, 0.012926581400361929, 0.012632179664003408, -0.25975774988976563, 0.006752676260062303, 0.05838128613223406, -0.05612709766401994, -0.04357893463086591, -0.01908527562839233, -0.011301725728447887, 0.1669124304211106, 0.0873910345141088, 0.02134392087596511, 0.1313846306769516, -0.13494972126632507, -0.05100652831871147, 0.437993282917887, -0.03285278044164774, -0.0959516900422221, 0.26690800847824325, -0.22882596665824, -0.15019704375564205, 0.20104970531643962, 0.2021333804269406, 0.11037013855424117, -0.18349729782891122, 0.00463465822130357, 0.046036921737884935, 0.1847916286126499, 0.08545693852515383, 0.060426682053895835, 0.30352144286205823, 0.13003029494377022, 0.032859526601069694, 0.09484187000833283, -0.15147978401827542, -0.020021313690284096, -0.2688759946335763, -0.1414262396600944, -0.1325557391246548, 0.069847172949184, -0.07889134738516904, -0.12260307501392989, 0.4085315726340262, 0.1720361197843555, 0.1923175184320743, 5.2377193986268885e-05, 0.29724650290286675, 0.09443492663690863, 0.06535147077573294, 0.0406984337605536, 0.2930414829487828, 0.14510409460953352, 0.12022210916356099, -0.17674748749017122, 0.058238565355581653, -0.044229659982110286] |
1,802.01697 | Deep Learning with a Rethinking Structure for Multi-label Classification | Multi-label classification (MLC) is an important class of machine learning
problems that come with a wide spectrum of applications, each demanding a
possibly different evaluation criterion. When solving the MLC problems, we
generally expect the learning algorithm to take the hidden correlation of the
labels into account to improve the prediction performance. Extracting the
hidden correlation is generally a challenging task. In this work, we propose a
novel deep learning framework to better extract the hidden correlation with the
help of the memory structure within recurrent neural networks. The memory
stores the temporary guesses on the labels and effectively allows the framework
to rethink about the goodness and correlation of the guesses before making the
final prediction. Furthermore, the rethinking process makes it easy to adapt to
different evaluation criteria to match real-world application needs. In
particular, the framework can be trained in an end-to-end style with respect to
any given MLC evaluation criteria. The end-to-end design can be seamlessly
combined with other deep learning techniques to conquer challenging MLC
problems like image tagging. Experimental results across many real-world data
sets justify that the rethinking framework indeed improves MLC performance
across different evaluation criteria and leads to superior performance over
state-of-the-art MLC algorithms.
| cs.LG stat.ML | multilabel classification mlc is an important class of machine learning problems that come with a wide spectrum of applications each demanding a possibly different evaluation criterion when solving the mlc problems we generally expect the learning algorithm to take the hidden correlation of the labels into account to improve the prediction performance extracting the hidden correlation is generally a challenging task in this work we propose a novel deep learning framework to better extract the hidden correlation with the help of the memory structure within recurrent neural networks the memory stores the temporary guesses on the labels and effectively allows the framework to rethink about the goodness and correlation of the guesses before making the final prediction furthermore the rethinking process makes it easy to adapt to different evaluation criteria to match realworld application needs in particular the framework can be trained in an endtoend style with respect to any given mlc evaluation criteria the endtoend design can be seamlessly combined with other deep learning techniques to conquer challenging mlc problems like image tagging experimental results across many realworld data sets justify that the rethinking framework indeed improves mlc performance across different evaluation criteria and leads to superior performance over stateoftheart mlc algorithms | [['multilabel', 'classification', 'mlc', 'is', 'an', 'important', 'class', 'of', 'machine', 'learning', 'problems', 'that', 'come', 'with', 'a', 'wide', 'spectrum', 'of', 'applications', 'each', 'demanding', 'a', 'possibly', 'different', 'evaluation', 'criterion', 'when', 'solving', 'the', 'mlc', 'problems', 'we', 'generally', 'expect', 'the', 'learning', 'algorithm', 'to', 'take', 'the', 'hidden', 'correlation', 'of', 'the', 'labels', 'into', 'account', 'to', 'improve', 'the', 'prediction', 'performance', 'extracting', 'the', 'hidden', 'correlation', 'is', 'generally', 'a', 'challenging', 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1,802.01698 | Robust Watertight Manifold Surface Generation Method for ShapeNet Models | In this paper, we describe a robust algorithm for 2-Manifold generation of
various kinds of ShapeNet Models. The input of our pipeline is a triangle mesh,
with a set of vertices and triangular faces. The output of our pipeline is a
2-Manifold with vertices roughly uniformly distributed on the geometry surface.
Our algorithm uses an octree to represent the original mesh, and construct the
surface by isosurface extraction. Finally, we project the vertices to the
original mesh to achieve high precision. As a result, our method can be adopted
efficiently to all ShapeNet models with the guarantee of correct 2-Manifold
topology.
| cs.CG | in this paper we describe a robust algorithm for 2manifold generation of various kinds of shapenet models the input of our pipeline is a triangle mesh with a set of vertices and triangular faces the output of our pipeline is a 2manifold with vertices roughly uniformly distributed on the geometry surface our algorithm uses an octree to represent the original mesh and construct the surface by isosurface extraction finally we project the vertices to the original mesh to achieve high precision as a result our method can be adopted efficiently to all shapenet models with the guarantee of correct 2manifold topology | [['in', 'this', 'paper', 'we', 'describe', 'a', 'robust', 'algorithm', 'for', '2manifold', 'generation', 'of', 'various', 'kinds', 'of', 'shapenet', 'models', 'the', 'input', 'of', 'our', 'pipeline', 'is', 'a', 'triangle', 'mesh', 'with', 'a', 'set', 'of', 'vertices', 'and', 'triangular', 'faces', 'the', 'output', 'of', 'our', 'pipeline', 'is', 'a', '2manifold', 'with', 'vertices', 'roughly', 'uniformly', 'distributed', 'on', 'the', 'geometry', 'surface', 'our', 'algorithm', 'uses', 'an', 'octree', 'to', 'represent', 'the', 'original', 'mesh', 'and', 'construct', 'the', 'surface', 'by', 'isosurface', 'extraction', 'finally', 'we', 'project', 'the', 'vertices', 'to', 'the', 'original', 'mesh', 'to', 'achieve', 'high', 'precision', 'as', 'a', 'result', 'our', 'method', 'can', 'be', 'adopted', 'efficiently', 'to', 'all', 'shapenet', 'models', 'with', 'the', 'guarantee', 'of', 'correct', '2manifold', 'topology']] | [-0.08313191176558116, 0.018495140446374184, -0.08420847258576662, -0.005089798788908906, -0.0722677931143432, -0.11066000549454648, 0.02679389018201186, 0.4056901998891689, -0.28020463330615863, -0.36381786908622427, 0.09094300968365024, -0.25992026753115033, -0.14396704973636823, 0.16220474369953028, -0.12672585973949493, 0.07952846399978689, 0.13142782325584368, 0.022440518317098666, -0.023601191556357808, -0.2998801401567341, 0.31825816366789256, 0.034675351095081554, 0.2733681710381614, 0.007805578392183427, 0.14473263001862433, -0.04838444052107337, -0.03206819341988257, 0.05116969917262305, -0.10315450125069607, 0.1802632185344649, 0.21999170623195535, 0.16157852516896876, 0.1932514741887698, -0.40623030114439457, -0.17587926843212826, 0.08279325064308572, 0.11784406508189986, 0.14581730928603964, -0.0321651657105027, -0.26917740065456913, 0.15212069426451136, -0.11525029571505614, -0.1077027392785738, -0.06579632919724329, -0.04028962744344579, 0.020890543532401027, -0.29966421138568977, -0.02722804138602892, 0.07032657880797097, 0.008079754949390594, -0.01700205385966208, -0.10244047854990136, -0.044464067808389296, 0.15320010571440884, -0.06584658874383215, 0.12218822872192406, 0.07528163548178583, -0.08118615900442963, -0.12091167390088339, 0.40339219147837396, -0.04471858164657479, -0.2583440558865002, 0.1626034812877268, -0.08493360533554217, -0.10808631688319516, 0.12064406892174098, 0.22204298101881942, 0.14945484231696418, -0.11332537499394747, 0.07324888582438194, -0.060289537418855, 0.18509264422193317, 0.04004388888790687, -0.03145171874341103, 0.16569165649390458, 0.2216942573673931, 0.11457989068867841, 0.16940753752859034, -0.1051664272191275, -0.02430368261757574, -0.32342184270446256, -0.1486259946728697, -0.19838532797489683, -0.019816230378565516, -0.16618228735520946, -0.2367465960064737, 0.43175590370256123, 0.17492900947846546, 0.21717813284145576, 0.09632614846940678, 0.35276261944840154, 0.03442841644948095, 0.07935763320466042, 0.13014879230741816, 0.13831179118069756, 0.07648345057871009, 0.04219027088106711, -0.1624768295781779, 0.01883689812522861, 0.1477662335693984] |
1,802.01699 | Boundarylike behaviors of the resonance interatomic energy in a cosmic
string spacetime | By generalizing the formalism proposed by Dalibard, Dupont-Roc and Cohen
Tannoudji, we study the resonance interatomic energy of two identical atoms
coupled to quantum massless scalar fields in a symmetric /antisymmetric
entangled state in the Minkowski and cosmic string spacetimes. We find that in
both spacetimes, the resonance interatomic energy has nothing to do with the
field fluctuations but is attributed to the radiation reaction of the atoms
only. We then concretely calculate the resonance interatomic energy of two
static atoms near a perfectly reflecting boundary in the Minkowski spacetime
and near an infinite and straight cosmic string respectively. We show that the
resonance interatomic energy in both cases can be enhanced or suppressed and
even nullified as compared with that in an unbounded Minkowski spacetime,
because of the presence of the boundary in the Minkowski spacetime or the
nontrivial spacetime topological structure of the cosmic string. Besides, we
also discover that the resonance interatomic energy in the cosmic string
spacetime exhibits some peculiar properties, making it in principle possible to
sense different cosmic string spacetimes via the resonance interatomic energy.
| gr-qc hep-th quant-ph | by generalizing the formalism proposed by dalibard dupontroc and cohen tannoudji we study the resonance interatomic energy of two identical atoms coupled to quantum massless scalar fields in a symmetric antisymmetric entangled state in the minkowski and cosmic string spacetimes we find that in both spacetimes the resonance interatomic energy has nothing to do with the field fluctuations but is attributed to the radiation reaction of the atoms only we then concretely calculate the resonance interatomic energy of two static atoms near a perfectly reflecting boundary in the minkowski spacetime and near an infinite and straight cosmic string respectively we show that the resonance interatomic energy in both cases can be enhanced or suppressed and even nullified as compared with that in an unbounded minkowski spacetime because of the presence of the boundary in the minkowski spacetime or the nontrivial spacetime topological structure of the cosmic string besides we also discover that the resonance interatomic energy in the cosmic string spacetime exhibits some peculiar properties making it in principle possible to sense different cosmic string spacetimes via the resonance interatomic energy | [['by', 'generalizing', 'the', 'formalism', 'proposed', 'by', 'dalibard', 'dupontroc', 'and', 'cohen', 'tannoudji', 'we', 'study', 'the', 'resonance', 'interatomic', 'energy', 'of', 'two', 'identical', 'atoms', 'coupled', 'to', 'quantum', 'massless', 'scalar', 'fields', 'in', 'a', 'symmetric', 'antisymmetric', 'entangled', 'state', 'in', 'the', 'minkowski', 'and', 'cosmic', 'string', 'spacetimes', 'we', 'find', 'that', 'in', 'both', 'spacetimes', 'the', 'resonance', 'interatomic', 'energy', 'has', 'nothing', 'to', 'do', 'with', 'the', 'field', 'fluctuations', 'but', 'is', 'attributed', 'to', 'the', 'radiation', 'reaction', 'of', 'the', 'atoms', 'only', 'we', 'then', 'concretely', 'calculate', 'the', 'resonance', 'interatomic', 'energy', 'of', 'two', 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1,802.017 | Modelling non-linear control systems using the discrete Urysohn operator | This paper introduces a multiple-input discrete Urysohn operator for
modelling non-linear control systems and a technique of its identification by
processing the observed input and output signals. It is shown that, due to the
nature of the discrete Urysohn operator, the identification problem always has
an infinity of solutions, which exactly convert the inputs to the output. The
suggested iterative identification procedure, however, leads to a unique
solution with the minimum norm, requires only few arithmetic operations with
the parameter values and is applicable to a real-time identification, running
concurrently with the data reading. The efficiency of the proposed modelling
and identification approaches is demonstrated using an example of a non-linear
mechanical system, which is represented by a differential equation, and an
example of a complex real-world dynamic object.
| math.OC cs.SY | this paper introduces a multipleinput discrete urysohn operator for modelling nonlinear control systems and a technique of its identification by processing the observed input and output signals it is shown that due to the nature of the discrete urysohn operator the identification problem always has an infinity of solutions which exactly convert the inputs to the output the suggested iterative identification procedure however leads to a unique solution with the minimum norm requires only few arithmetic operations with the parameter values and is applicable to a realtime identification running concurrently with the data reading the efficiency of the proposed modelling and identification approaches is demonstrated using an example of a nonlinear mechanical system which is represented by a differential equation and an example of a complex realworld dynamic object | [['this', 'paper', 'introduces', 'a', 'multipleinput', 'discrete', 'urysohn', 'operator', 'for', 'modelling', 'nonlinear', 'control', 'systems', 'and', 'a', 'technique', 'of', 'its', 'identification', 'by', 'processing', 'the', 'observed', 'input', 'and', 'output', 'signals', 'it', 'is', 'shown', 'that', 'due', 'to', 'the', 'nature', 'of', 'the', 'discrete', 'urysohn', 'operator', 'the', 'identification', 'problem', 'always', 'has', 'an', 'infinity', 'of', 'solutions', 'which', 'exactly', 'convert', 'the', 'inputs', 'to', 'the', 'output', 'the', 'suggested', 'iterative', 'identification', 'procedure', 'however', 'leads', 'to', 'a', 'unique', 'solution', 'with', 'the', 'minimum', 'norm', 'requires', 'only', 'few', 'arithmetic', 'operations', 'with', 'the', 'parameter', 'values', 'and', 'is', 'applicable', 'to', 'a', 'realtime', 'identification', 'running', 'concurrently', 'with', 'the', 'data', 'reading', 'the', 'efficiency', 'of', 'the', 'proposed', 'modelling', 'and', 'identification', 'approaches', 'is', 'demonstrated', 'using', 'an', 'example', 'of', 'a', 'nonlinear', 'mechanical', 'system', 'which', 'is', 'represented', 'by', 'a', 'differential', 'equation', 'and', 'an', 'example', 'of', 'a', 'complex', 'realworld', 'dynamic', 'object']] | [-0.12832008436405237, 0.024215159179122085, -0.08662874734073393, 0.010903499410451614, -0.09649423872979805, -0.16567192190550556, 0.02177685474464309, 0.32359705189452326, -0.3072712154293707, -0.31940176359616046, 0.15651667999174057, -0.25432664232126384, -0.177846116613048, 0.20530885870590113, -0.07783040294221552, 0.1279194316554448, 0.0873031611662618, 0.06142903454854449, -0.04704505251179081, -0.19441293380692487, 0.2770708752254587, 0.06451988285912792, 0.2827904255202946, -0.0035726677918763356, 0.18257784708033048, 0.020136968043177973, -0.03974780571726404, -0.007363210796818946, -0.048098269644540344, 0.12261900464487947, 0.27731429574679034, 0.16564763828303464, 0.3108411835896414, -0.36911963879369025, -0.2338629207364464, 0.12436073428640763, 0.1282765587201602, 0.08931355825047796, -0.05934085225949945, -0.28476797556865585, 0.07245556617430014, -0.1502555774149391, -0.09496278836312451, -0.07666353061939626, 0.02319458910163001, -0.007701202549307441, -0.31934880890500866, 0.01830345481388675, 0.0857054999661307, 0.026289211317189327, -0.07701518027700281, -0.04738995812873017, 0.0048690277202300325, 0.10569997757940387, 0.02047647242416274, 0.022991900577736916, 0.09755963819505747, -0.12535486098599094, -0.13091449271670955, 0.3953660587787397, -0.01006502569147725, -0.25640915424469135, 0.18952130395269326, -0.06347254500724375, -0.09597529574882152, 0.14331695674232733, 0.16074215351105775, 0.13592265651366392, -0.16671147004722855, 0.09073743391412044, -0.021287288567296756, 0.23297559867013795, 0.02755993541849907, 0.016463225609947774, 0.14016269189269506, 0.20024556831218476, 0.09602248277370781, 0.16105750578188505, -0.06057318345627336, -0.08274009707203323, -0.2671036119261475, -0.14117733519993608, -0.1793160430668283, 0.030046612742652957, -0.07568796181114112, -0.18982327681160244, 0.40509939159071723, 0.1372163173735373, 0.1964195617582909, 0.040921159379198685, 0.32980043905996537, 0.18740594181658107, 0.07541830265937849, 0.06010765990227923, 0.1951453155448097, 0.14007586680980788, 0.11884148611665465, -0.2341551465043697, 0.06552313145993696, 0.06495703971951969] |
1,802.01701 | 3D numerical modeling of liquid metal turbulent flow in an annular
linear induction pump | 3D numerical simulation of the liquid metal flow affected by electromagnetic
field in the Annular Linear Induction Pump (ALIP) is performed using modified
ANSYS package. ANSYS/EMAG has been modified to take into account arbitrary
velocity field at the calculation of the electromagnetic field and has been
unified with CFX to provide integration of all the system of
magnetohydrodynamic (MHD) equations defining dynamics of the conductive media
in the variable electromagnetic field. The non-stationary problem is solved
taking into account the influence of the metal flow on the electromagnetic
field. The pump performance curve and the dependence of the pump efficiency on
a flow rate are obtained.
| physics.app-ph | 3d numerical simulation of the liquid metal flow affected by electromagnetic field in the annular linear induction pump alip is performed using modified ansys package ansysemag has been modified to take into account arbitrary velocity field at the calculation of the electromagnetic field and has been unified with cfx to provide integration of all the system of magnetohydrodynamic mhd equations defining dynamics of the conductive media in the variable electromagnetic field the nonstationary problem is solved taking into account the influence of the metal flow on the electromagnetic field the pump performance curve and the dependence of the pump efficiency on a flow rate are obtained | [['3d', 'numerical', 'simulation', 'of', 'the', 'liquid', 'metal', 'flow', 'affected', 'by', 'electromagnetic', 'field', 'in', 'the', 'annular', 'linear', 'induction', 'pump', 'alip', 'is', 'performed', 'using', 'modified', 'ansys', 'package', 'ansysemag', 'has', 'been', 'modified', 'to', 'take', 'into', 'account', 'arbitrary', 'velocity', 'field', 'at', 'the', 'calculation', 'of', 'the', 'electromagnetic', 'field', 'and', 'has', 'been', 'unified', 'with', 'cfx', 'to', 'provide', 'integration', 'of', 'all', 'the', 'system', 'of', 'magnetohydrodynamic', 'mhd', 'equations', 'defining', 'dynamics', 'of', 'the', 'conductive', 'media', 'in', 'the', 'variable', 'electromagnetic', 'field', 'the', 'nonstationary', 'problem', 'is', 'solved', 'taking', 'into', 'account', 'the', 'influence', 'of', 'the', 'metal', 'flow', 'on', 'the', 'electromagnetic', 'field', 'the', 'pump', 'performance', 'curve', 'and', 'the', 'dependence', 'of', 'the', 'pump', 'efficiency', 'on', 'a', 'flow', 'rate', 'are', 'obtained']] | [-0.1581974516534025, 0.08684800180296103, -0.10731533905491233, 0.006975266095694332, -0.074455754671778, -0.1053887452353679, -0.04881983886783322, 0.3689026171252841, -0.24147578288047086, -0.30130518574622417, 0.06035501257782536, -0.2291923944328335, -0.04940498867293908, 0.23859825267323426, 0.05809030256101063, 0.0805222982052891, 0.01594448843970895, -0.0151414791751276, -0.027584198245867376, -0.18392538528978114, 0.30624994993697674, 0.06013687813565845, 0.2997458650774899, 0.02749231317568393, 0.13810104204430468, 0.013032480535496558, -0.049486995492840094, 0.08681846049037717, -0.11935180765576661, 0.030390456433053173, 0.1795859589485363, 0.045917032636879455, 0.2520396279791991, -0.5173761145987859, -0.2900191812820378, 0.00567980290700992, 0.13291783101768012, 0.1039106379263103, -0.06472269424148613, -0.2894001997209021, 0.0504446558122124, -0.15085531439454783, -0.099895777525602, -0.04112477900371665, -0.013271390885070322, 0.056666033504076216, -0.2759070467913435, 0.037118966096923466, 0.037694851222581094, 0.0809973556991844, -0.10125391276198484, -0.06857139499569755, -0.03060909698140763, 0.12422968863642642, 0.06839787681099205, 0.03540956515020558, 0.16767671059905773, -0.1660970201848873, -0.03783286603256351, 0.404389511279407, -0.09245928959876654, -0.2128445125938881, 0.10526166733886515, -0.17476697365886398, -0.0068522478032502394, 0.22618428080209663, 0.21071859601485943, 0.09103223868601379, -0.13556790292440427, 0.10721585540256152, -0.04698039991781115, 0.1397988187592654, 0.04883990920858369, -0.021537411110919145, 0.21255906436015806, 0.1802440877516, -0.04234529632321071, 0.16773138570022725, -0.08226518672003988, -0.09259377510863401, -0.2682860956302777, -0.1640186140845929, -0.14152339928051724, 0.05472136953668225, -0.08229117082526154, -0.15470216948361623, 0.4281776242135536, 0.1337563970347955, 0.07929974071504105, -0.024822029959233036, 0.3400671988725662, 0.1963415658456229, 0.053570637295377393, 0.07601814627470005, 0.2930312648681658, 0.19779884123598182, 0.14263273806621632, -0.3018116871604607, 0.02493988302358914, 0.08625296952114218] |
1,802.01702 | The Dynamics of Tightly-packed Planetary Systems in the Presence of an
Outer Planet: case studies using Kepler-11 and Kepler-90 | We explore the effects of an undetected outer giant planet on the dynamics,
observability, and stability of Systems with Tightly-packed Inner Planets
(STIPs). We use direct numerical simulations along with secular theory and
synthetic secular frequency spectra to analyze how analogues of Kepler-11 and
Kepler-90 behave in the presence of a nearly co-planar, Jupiter-like outer
perturber with semi-major axes between 1 and 5.2 au. Most locations of the
outer perturber do not affect the evolution of the inner planetary systems,
apart from altering precession frequencies. However, there are locations at
which an outer planet causes system instability due to, in part, secular
eccentricity resonances. In Kepler-90, there is a range of orbital distances
for which the outer perturber drives planets b and c, through secular
interactions, onto orbits with inclinations that are $\sim16^\circ$ away from
the rest of the planets. Kepler-90 is stable in this configuration. Such
secular resonances can thus affect the observed multiplicity of transiting
systems. We also compare the synthetic apsidal and nodal precession frequencies
with the secular theory and find some misalignment between principal
frequencies, indicative of strong interactions between the planets (consistent
with the system showing TTVs). First-order libration angles are calculated to
identify MMRs in the systems, for which two near-MMRs are shown in Kepler-90,
with a 5:4 between b and c, as well as a 3:2 between g and h.
| astro-ph.EP | we explore the effects of an undetected outer giant planet on the dynamics observability and stability of systems with tightlypacked inner planets stips we use direct numerical simulations along with secular theory and synthetic secular frequency spectra to analyze how analogues of kepler11 and kepler90 behave in the presence of a nearly coplanar jupiterlike outer perturber with semimajor axes between 1 and 52 au most locations of the outer perturber do not affect the evolution of the inner planetary systems apart from altering precession frequencies however there are locations at which an outer planet causes system instability due to in part secular eccentricity resonances in kepler90 there is a range of orbital distances for which the outer perturber drives planets b and c through secular interactions onto orbits with inclinations that are sim16circ away from the rest of the planets kepler90 is stable in this configuration such secular resonances can thus affect the observed multiplicity of transiting systems we also compare the synthetic apsidal and nodal precession frequencies with the secular theory and find some misalignment between principal frequencies indicative of strong interactions between the planets consistent with the system showing ttvs firstorder libration angles are calculated to identify mmrs in the systems for which two nearmmrs are shown in kepler90 with a 54 between b and c as well as a 32 between g and h | [['we', 'explore', 'the', 'effects', 'of', 'an', 'undetected', 'outer', 'giant', 'planet', 'on', 'the', 'dynamics', 'observability', 'and', 'stability', 'of', 'systems', 'with', 'tightlypacked', 'inner', 'planets', 'stips', 'we', 'use', 'direct', 'numerical', 'simulations', 'along', 'with', 'secular', 'theory', 'and', 'synthetic', 'secular', 'frequency', 'spectra', 'to', 'analyze', 'how', 'analogues', 'of', 'kepler11', 'and', 'kepler90', 'behave', 'in', 'the', 'presence', 'of', 'a', 'nearly', 'coplanar', 'jupiterlike', 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1,802.01703 | The octupole collective Hamiltonian. Does it follow the example of the
quadrupole case? | A general form of the octupole collective Hamiltonian is introduced and
analyzed based on fundamental tensors in the seven-dimensional tensor space.
Possible definitions of intrinsic frames of reference possessing cubic symmetry
for the octupole tensor are considered. Cubic intrinsic octupole coordinates or
deformations are introduced. Shapes of the octupoloid are investigated. The
octupole collective Hamiltonian is expressed in intrinsic coordinates. An
intrinsic angular momentum carried by the octupole vibrations is discovered.
Small oscillations about an axially-symmetric pear shape are analyzed.
Formulation of a unified quadrupole-octupole collective model is discussed.
| nucl-th | a general form of the octupole collective hamiltonian is introduced and analyzed based on fundamental tensors in the sevendimensional tensor space possible definitions of intrinsic frames of reference possessing cubic symmetry for the octupole tensor are considered cubic intrinsic octupole coordinates or deformations are introduced shapes of the octupoloid are investigated the octupole collective hamiltonian is expressed in intrinsic coordinates an intrinsic angular momentum carried by the octupole vibrations is discovered small oscillations about an axiallysymmetric pear shape are analyzed formulation of a unified quadrupoleoctupole collective model is discussed | [['a', 'general', 'form', 'of', 'the', 'octupole', 'collective', 'hamiltonian', 'is', 'introduced', 'and', 'analyzed', 'based', 'on', 'fundamental', 'tensors', 'in', 'the', 'sevendimensional', 'tensor', 'space', 'possible', 'definitions', 'of', 'intrinsic', 'frames', 'of', 'reference', 'possessing', 'cubic', 'symmetry', 'for', 'the', 'octupole', 'tensor', 'are', 'considered', 'cubic', 'intrinsic', 'octupole', 'coordinates', 'or', 'deformations', 'are', 'introduced', 'shapes', 'of', 'the', 'octupoloid', 'are', 'investigated', 'the', 'octupole', 'collective', 'hamiltonian', 'is', 'expressed', 'in', 'intrinsic', 'coordinates', 'an', 'intrinsic', 'angular', 'momentum', 'carried', 'by', 'the', 'octupole', 'vibrations', 'is', 'discovered', 'small', 'oscillations', 'about', 'an', 'axiallysymmetric', 'pear', 'shape', 'are', 'analyzed', 'formulation', 'of', 'a', 'unified', 'quadrupoleoctupole', 'collective', 'model', 'is', 'discussed']] | [-0.2236167551441626, 0.1828130344699523, -0.024591347477822142, 0.10091473709855397, -0.1001430562147024, -0.08590119100302797, -0.1016533650055697, 0.36726769330826675, -0.1957593609959903, -0.2397322847761891, -0.0030349901247642597, -0.2465448930584402, -0.15592129454175432, 0.097276033135131, -0.019240499241277575, 0.017534429905936122, -0.01841336854638278, 0.05097813705321063, -0.13019834884339201, -0.15848418236815964, 0.27376939554233104, 0.09595282148273493, 0.287770044894635, -0.03705636015564034, 0.14117655657570471, 0.020015617594419218, -0.018934530071088706, 0.04065458324641275, -0.12370158172498949, 0.12725144896037158, 0.2057926635077985, 0.03701517939440568, 0.15744394252330743, -0.4139959019270133, -0.1519684088981938, 0.0631561733104966, 0.12805421056956137, 0.1601896460633725, -0.008954956790231254, -0.32029666315594857, 0.009152046955105934, -0.17784361185675318, -0.20394258874743668, -0.2292955381351269, 0.08147480425594206, 0.038229245226830244, -0.20097325993066822, 0.13881432537031782, 0.12961702269967645, 0.14348520448600705, -0.1543059070615775, -0.16241021274816542, -0.09082441487010907, 0.047845041612163186, 0.07229915116146333, -0.006105332476594908, 0.14385345387828155, -0.03015567289548926, -0.07638476986903697, 0.46458665654063225, 0.04268865591571243, -0.28996639527295803, 0.04086243487439457, -0.08748345729492774, -0.12088415746058506, 0.1425089926368938, 0.1737576112447476, 0.1278388852687468, -0.1664503077997572, 0.12105574117991967, 0.007151402924633162, 0.13627647699005055, 0.08147211134730076, 0.06280095997830028, 0.22268446975133635, 0.11677574663719331, -0.018994972691871226, 0.1495294927629981, -0.07347745415807533, -0.13391583781247557, -0.33986570220440626, -0.029539905763654548, -0.2133483928734098, 0.03488149367992512, -0.10003532661870519, -0.1463760175498795, 0.4076326904760208, -0.02499233459820971, 0.1567224606895417, -0.08550416214645586, 0.23723968252306804, 0.10068008007841524, 0.07946276625443716, 0.013056261083957825, 0.3543035263005136, 0.21381837891848673, 0.015712070125366816, -0.2605834184505511, -0.008463972221678969, 0.09846981288071467] |
1,802.01704 | The Maveric Survey: a Red Straggler Binary with an Invisible Companion
in the Galactic Globular Cluster M10 | We present the discovery and characterization of a radio-bright binary in the
Galactic globular cluster M10. First identified in deep radio continuum data
from the Karl G. Jansky Very Large Array, M10-VLA1 has a flux density of
$27\pm4$ $\mu$Jy at 7.4 GHz and a flat to inverted radio spectrum. Chandra
imaging shows an X-ray source with $L_X \approx 10^{31}$ erg s$^{-1}$ matching
the location of the radio source. This places M10-VLA1 within the scatter of
the radio--X-ray luminosity correlation for quiescent stellar-mass black holes,
and a black hole X-ray binary is a viable explanation for this system. The
radio and X-ray properties of the source disfavor, though do not rule out,
identification as an accreting neutron star or white dwarf system. Optical
imaging from the Hubble Space Telescope and spectroscopy from the SOAR
telescope show the system has an orbital period of 3.339 d and an unusual "red
straggler" component: an evolved star found redward of M10's red giant branch.
These data also show UV/optical variability and double-peaked H$\alpha$
emission characteristic of an accretion disk. However, SOAR spectroscopic
monitoring reveals that the velocity semi-amplitude of the red straggler is
low. We conclude that M10-VLA1 is most likely either a quiescent black hole
X-ray binary with a rather face-on ($ i < $ 4$^{\circ}$) orientation or an
unusual flaring RS CVn-type active binary, and discuss future observations that
could distinguish between these possibilities.
| astro-ph.HE astro-ph.SR | we present the discovery and characterization of a radiobright binary in the galactic globular cluster m10 first identified in deep radio continuum data from the karl g jansky very large array m10vla1 has a flux density of 27pm4 mujy at 74 ghz and a flat to inverted radio spectrum chandra imaging shows an xray source with l_x approx 1031 erg s1 matching the location of the radio source this places m10vla1 within the scatter of the radioxray luminosity correlation for quiescent stellarmass black holes and a black hole xray binary is a viable explanation for this system the radio and xray properties of the source disfavor though do not rule out identification as an accreting neutron star or white dwarf system optical imaging from the hubble space telescope and spectroscopy from the soar telescope show the system has an orbital period of 3339 d and an unusual red straggler component an evolved star found redward of m10s red giant branch these data also show uvoptical variability and doublepeaked halpha emission characteristic of an accretion disk however soar spectroscopic monitoring reveals that the velocity semiamplitude of the red straggler is low we conclude that m10vla1 is most likely either a quiescent black hole xray binary with a rather faceon i 4circ orientation or an unusual flaring rs cvntype active binary and discuss future observations that could distinguish between these possibilities | [['we', 'present', 'the', 'discovery', 'and', 'characterization', 'of', 'a', 'radiobright', 'binary', 'in', 'the', 'galactic', 'globular', 'cluster', 'm10', 'first', 'identified', 'in', 'deep', 'radio', 'continuum', 'data', 'from', 'the', 'karl', 'g', 'jansky', 'very', 'large', 'array', 'm10vla1', 'has', 'a', 'flux', 'density', 'of', '27pm4', 'mujy', 'at', '74', 'ghz', 'and', 'a', 'flat', 'to', 'inverted', 'radio', 'spectrum', 'chandra', 'imaging', 'shows', 'an', 'xray', 'source', 'with', 'l_x', 'approx', '1031', 'erg', 's1', 'matching', 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1,802.01705 | Bernstein operators and super-Schur functions: combinatorial aspects | The Bernstein vertex operators, which can be used to build recursively the
Schur functions, are extended to superspace. Four families of super vertex
operators are defined, corresponding to the four natural families of Schur
functions in superspace. Combinatorial proofs that the super Bernstein vertex
operators indeed build the Schur functions in superspace recursively are
provided. We briefly mention a possible realization, in terms of symmetric
functions in superspace, of the super-KP hierarchy, where the tau-function
naturally expands in one of the super-Schur bases.
| math-ph math.CO math.MP | the bernstein vertex operators which can be used to build recursively the schur functions are extended to superspace four families of super vertex operators are defined corresponding to the four natural families of schur functions in superspace combinatorial proofs that the super bernstein vertex operators indeed build the schur functions in superspace recursively are provided we briefly mention a possible realization in terms of symmetric functions in superspace of the superkp hierarchy where the taufunction naturally expands in one of the superschur bases | [['the', 'bernstein', 'vertex', 'operators', 'which', 'can', 'be', 'used', 'to', 'build', 'recursively', 'the', 'schur', 'functions', 'are', 'extended', 'to', 'superspace', 'four', 'families', 'of', 'super', 'vertex', 'operators', 'are', 'defined', 'corresponding', 'to', 'the', 'four', 'natural', 'families', 'of', 'schur', 'functions', 'in', 'superspace', 'combinatorial', 'proofs', 'that', 'the', 'super', 'bernstein', 'vertex', 'operators', 'indeed', 'build', 'the', 'schur', 'functions', 'in', 'superspace', 'recursively', 'are', 'provided', 'we', 'briefly', 'mention', 'a', 'possible', 'realization', 'in', 'terms', 'of', 'symmetric', 'functions', 'in', 'superspace', 'of', 'the', 'superkp', 'hierarchy', 'where', 'the', 'taufunction', 'naturally', 'expands', 'in', 'one', 'of', 'the', 'superschur', 'bases']] | [-0.07569458099861089, 0.12597909618462264, -0.03000884723884088, 0.1134466641915985, -0.1397784443968838, -0.11232780008059409, -0.043106632939551345, 0.32910158429122355, -0.30787835808263886, -0.16606311053957468, 0.11723169254823185, -0.24758396219508147, -0.20627927881332092, 0.14618381815330114, -0.07660975754490973, 0.04527632035544993, -0.005212188336170382, 0.040490963582501364, -0.1498802087066176, -0.3104285195262896, 0.3854310411017066, -0.03376171330886858, 0.17802859603622814, 0.0093980584046401, 0.09590509487890903, -0.0025866746293081912, -0.07191412065776041, -0.0709674326116564, -0.06630625990034371, 0.17815678094134288, 0.3359761426202309, 0.2004263719750775, 0.17048295842552627, -0.44529295915070877, -0.08541040749139624, 0.13994396566470832, 0.22846387203115923, 0.03311926553480005, 0.042617172462704744, -0.23446882222951562, -0.02579221651992864, -0.21024205395376977, -0.2047047922272741, -0.10418190788132725, 0.019517380514262633, 0.032453975065346856, -0.2819973248528478, -0.004279026031540132, 0.05085845810740634, -0.005670650166539866, -0.01838928004468067, -0.16807495439310133, -0.0717485922469217, 0.04384943633052854, -0.06279560367082372, 0.0684413879442914, 0.09528533715386818, -0.09788619781510881, -0.22020084852421726, 0.3182373004793017, 0.0024312274231586928, -0.3084498284453595, 0.11736692629041678, -0.19455868897982587, -0.21493895919303652, 0.03742754068455578, 0.0778617760415166, 0.168463476807063, -0.16134767117047752, 0.17671442319305591, -0.09262816518269203, 0.03314630116226819, 0.18145297387798812, 0.0630627671705076, 0.1428316836187869, 0.022852398731090403, 0.06376491852656559, 0.20298385867176372, 0.11327623325273578, -0.10659915732038724, -0.4064244323950491, -0.14927756992013505, -0.12016558398803075, 0.009417708488871102, -0.1536211344416334, -0.2053001316977136, 0.4749240928593977, 0.07974401007716854, 0.16552289215456925, 0.08123291562236616, 0.15176287712529302, 0.1806701229264339, 0.1643689007003918, 0.000668472823123505, 0.17597334129436884, 0.2107416929067745, 0.02448049590083552, -0.1185803393844837, -0.08261315687559545, 0.2806267148964567] |
1,802.01706 | Interactive Robot Transition Repair With SMT | Complex robot behaviors are often structured as state machines, where states
encapsulate actions and a transition function switches between states. Since
transitions depend on physical parameters, when the environment changes, a
roboticist has to painstakingly readjust the parameters to work in the new
environment. We present interactive SMT-based Robot Transition Repair (SRTR):
instead of manually adjusting parameters, we ask the roboticist to identify a
few instances where the robot is in a wrong state and what the right state
should be. A lightweight automated analysis of the transition function's source
code then 1) identifies adjustable parameters, 2) converts the transition
function into a system of logical constraints, and 3) formulates the
constraints and user-supplied corrections as MaxSMT problem that yields new
parameter values. Our evaluation shows that SRTR is effective on real robots
and in simulation. We show that SRTR finds new parameters 1) quickly, 2) with
only a few corrections, and 3) that the parameters generalize to new scenarios.
We also show that a simple state machine corrected by SRTR can out-perform a
more complex, expert-tuned state machine in the real world.
| cs.RO cs.PL | complex robot behaviors are often structured as state machines where states encapsulate actions and a transition function switches between states since transitions depend on physical parameters when the environment changes a roboticist has to painstakingly readjust the parameters to work in the new environment we present interactive smtbased robot transition repair srtr instead of manually adjusting parameters we ask the roboticist to identify a few instances where the robot is in a wrong state and what the right state should be a lightweight automated analysis of the transition functions source code then 1 identifies adjustable parameters 2 converts the transition function into a system of logical constraints and 3 formulates the constraints and usersupplied corrections as maxsmt problem that yields new parameter values our evaluation shows that srtr is effective on real robots and in simulation we show that srtr finds new parameters 1 quickly 2 with only a few corrections and 3 that the parameters generalize to new scenarios we also show that a simple state machine corrected by srtr can outperform a more complex experttuned state machine in the real world | [['complex', 'robot', 'behaviors', 'are', 'often', 'structured', 'as', 'state', 'machines', 'where', 'states', 'encapsulate', 'actions', 'and', 'a', 'transition', 'function', 'switches', 'between', 'states', 'since', 'transitions', 'depend', 'on', 'physical', 'parameters', 'when', 'the', 'environment', 'changes', 'a', 'roboticist', 'has', 'to', 'painstakingly', 'readjust', 'the', 'parameters', 'to', 'work', 'in', 'the', 'new', 'environment', 'we', 'present', 'interactive', 'smtbased', 'robot', 'transition', 'repair', 'srtr', 'instead', 'of', 'manually', 'adjusting', 'parameters', 'we', 'ask', 'the', 'roboticist', 'to', 'identify', 'a', 'few', 'instances', 'where', 'the', 'robot', 'is', 'in', 'a', 'wrong', 'state', 'and', 'what', 'the', 'right', 'state', 'should', 'be', 'a', 'lightweight', 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1,802.01707 | PALFA Discovery of a Highly Relativistic Double Neutron Star Binary | We report the discovery and initial follow-up of a double neutron star (DNS)
system, PSR J1946$+$2052, with the Arecibo L-Band Feed Array pulsar (PALFA)
survey. PSR J1946$+$2052 is a 17-ms pulsar in a 1.88-hour, eccentric ($e \, =\,
0.06$) orbit with a $\gtrsim 1.2 \, M_\odot$ companion. We have used the Jansky
Very Large Array to localize PSR J1946$+$2052 to a precision of 0.09 arcseconds
using a new phase binning mode. We have searched multiwavelength catalogs for
coincident sources but did not find any counterparts. The improved position
enabled a measurement of the spin period derivative of the pulsar ($\dot{P} \,
= \, 9\,\pm \, 2 \,\times 10^{-19}$); the small inferred magnetic field
strength at the surface ($B_S \, = \, 4 \, \times \, 10^9 \, \rm G$) indicates
that this pulsar has been recycled. This and the orbital eccentricity lead to
the conclusion that PSR J1946$+$2052 is in a DNS system. Among all known radio
pulsars in DNS systems, PSR J1946$+$2052 has the shortest orbital period and
the shortest estimated merger timescale, 46 Myr; at that time it will display
the largest spin effects on gravitational wave waveforms of any such system
discovered to date. We have measured the advance of periastron passage for this
system, $\dot{\omega} \, = \, 25.6 \, \pm \, 0.3\, \deg \rm yr^{-1}$, implying
a total system mass of only 2.50 $\pm$ 0.04 $M_\odot$, so it is among the
lowest mass DNS systems. This total mass measurement combined with the minimum
companion mass constrains the pulsar mass to $\lesssim 1.3 \, M_\odot$.
| astro-ph.HE astro-ph.SR gr-qc | we report the discovery and initial followup of a double neutron star dns system psr j19462052 with the arecibo lband feed array pulsar palfa survey psr j19462052 is a 17ms pulsar in a 188hour eccentric e 006 orbit with a gtrsim 12 m_odot companion we have used the jansky very large array to localize psr j19462052 to a precision of 009 arcseconds using a new phase binning mode we have searched multiwavelength catalogs for coincident sources but did not find any counterparts the improved position enabled a measurement of the spin period derivative of the pulsar dotp 9pm 2 times 1019 the small inferred magnetic field strength at the surface b_s 4 times 109 rm g indicates that this pulsar has been recycled this and the orbital eccentricity lead to the conclusion that psr j19462052 is in a dns system among all known radio pulsars in dns systems psr j19462052 has the shortest orbital period and the shortest estimated merger timescale 46 myr at that time it will display the largest spin effects on gravitational wave waveforms of any such system discovered to date we have measured the advance of periastron passage for this system dotomega 256 pm 03 deg rm yr1 implying a total system mass of only 250 pm 004 m_odot so it is among the lowest mass dns systems this total mass measurement combined with the minimum companion mass constrains the pulsar mass to lesssim 13 m_odot | [['we', 'report', 'the', 'discovery', 'and', 'initial', 'followup', 'of', 'a', 'double', 'neutron', 'star', 'dns', 'system', 'psr', 'j19462052', 'with', 'the', 'arecibo', 'lband', 'feed', 'array', 'pulsar', 'palfa', 'survey', 'psr', 'j19462052', 'is', 'a', '17ms', 'pulsar', 'in', 'a', '188hour', 'eccentric', 'e', '006', 'orbit', 'with', 'a', 'gtrsim', '12', 'm_odot', 'companion', 'we', 'have', 'used', 'the', 'jansky', 'very', 'large', 'array', 'to', 'localize', 'psr', 'j19462052', 'to', 'a', 'precision', 'of', '009', 'arcseconds', 'using', 'a', 'new', 'phase', 'binning', 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1,802.01708 | Superconducting metamaterials for waveguide quantum electrodynamics | The embedding of tunable quantum emitters in a photonic bandgap structure
enables the control of dissipative and dispersive interactions between emitters
and their photonic bath. Operation in the transmission band, outside the gap,
allows for studying waveguide quantum electrodynamics in the slow-light regime.
Alternatively, tuning the emitter into the bandgap results in finite range
emitter-emitter interactions via bound photonic states. Here we couple a
transmon qubit to a superconducting metamaterial with a deep sub-wavelength
lattice constant ($\lambda/60$). The metamaterial is formed by periodically
loading a transmission line with compact, low loss, low disorder lumped element
microwave resonators. We probe the coherent and dissipative dynamics of the
system by measuring the Lamb shift and the change in the lifetime of the
transmon qubit. Tuning the qubit frequency in the vicinity of a band-edge with
a group index of $n_g = 450$, we observe an anomalous Lamb shift of 10 MHz
accompanied by a 24-fold enhancement in the qubit lifetime. In addition, we
demonstrate selective enhancement and inhibition of spontaneous emission of
different transmon transitions, which provide simultaneous access to long-lived
metastable qubit states and states strongly coupled to propagating waveguide
modes.
| quant-ph | the embedding of tunable quantum emitters in a photonic bandgap structure enables the control of dissipative and dispersive interactions between emitters and their photonic bath operation in the transmission band outside the gap allows for studying waveguide quantum electrodynamics in the slowlight regime alternatively tuning the emitter into the bandgap results in finite range emitteremitter interactions via bound photonic states here we couple a transmon qubit to a superconducting metamaterial with a deep subwavelength lattice constant lambda60 the metamaterial is formed by periodically loading a transmission line with compact low loss low disorder lumped element microwave resonators we probe the coherent and dissipative dynamics of the system by measuring the lamb shift and the change in the lifetime of the transmon qubit tuning the qubit frequency in the vicinity of a bandedge with a group index of n_g 450 we observe an anomalous lamb shift of 10 mhz accompanied by a 24fold enhancement in the qubit lifetime in addition we demonstrate selective enhancement and inhibition of spontaneous emission of different transmon transitions which provide simultaneous access to longlived metastable qubit states and states strongly coupled to propagating waveguide modes | [['the', 'embedding', 'of', 'tunable', 'quantum', 'emitters', 'in', 'a', 'photonic', 'bandgap', 'structure', 'enables', 'the', 'control', 'of', 'dissipative', 'and', 'dispersive', 'interactions', 'between', 'emitters', 'and', 'their', 'photonic', 'bath', 'operation', 'in', 'the', 'transmission', 'band', 'outside', 'the', 'gap', 'allows', 'for', 'studying', 'waveguide', 'quantum', 'electrodynamics', 'in', 'the', 'slowlight', 'regime', 'alternatively', 'tuning', 'the', 'emitter', 'into', 'the', 'bandgap', 'results', 'in', 'finite', 'range', 'emitteremitter', 'interactions', 'via', 'bound', 'photonic', 'states', 'here', 'we', 'couple', 'a', 'transmon', 'qubit', 'to', 'a', 'superconducting', 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1,802.01709 | Weakly-supervised Dictionary Learning | We present a probabilistic modeling and inference framework for
discriminative analysis dictionary learning under a weak supervision setting.
Dictionary learning approaches have been widely used for tasks such as
low-level signal denoising and restoration as well as high-level classification
tasks, which can be applied to audio and image analysis. Synthesis dictionary
learning aims at jointly learning a dictionary and corresponding sparse
coefficients to provide accurate data representation. This approach is useful
for denoising and signal restoration, but may lead to sub-optimal
classification performance. By contrast, analysis dictionary learning provides
a transform that maps data to a sparse discriminative representation suitable
for classification. We consider the problem of analysis dictionary learning for
time-series data under a weak supervision setting in which signals are assigned
with a global label instead of an instantaneous label signal. We propose a
discriminative probabilistic model that incorporates both label information and
sparsity constraints on the underlying latent instantaneous label signal using
cardinality control. We present the expectation maximization (EM) procedure for
maximum likelihood estimation (MLE) of the proposed model. To facilitate a
computationally efficient E-step, we propose both a chain and a novel tree
graph reformulation of the graphical model. The performance of the proposed
model is demonstrated on both synthetic and real-world data.
| eess.SP cs.LG stat.ML | we present a probabilistic modeling and inference framework for discriminative analysis dictionary learning under a weak supervision setting dictionary learning approaches have been widely used for tasks such as lowlevel signal denoising and restoration as well as highlevel classification tasks which can be applied to audio and image analysis synthesis dictionary learning aims at jointly learning a dictionary and corresponding sparse coefficients to provide accurate data representation this approach is useful for denoising and signal restoration but may lead to suboptimal classification performance by contrast analysis dictionary learning provides a transform that maps data to a sparse discriminative representation suitable for classification we consider the problem of analysis dictionary learning for timeseries data under a weak supervision setting in which signals are assigned with a global label instead of an instantaneous label signal we propose a discriminative probabilistic model that incorporates both label information and sparsity constraints on the underlying latent instantaneous label signal using cardinality control we present the expectation maximization em procedure for maximum likelihood estimation mle of the proposed model to facilitate a computationally efficient estep we propose both a chain and a novel tree graph reformulation of the graphical model the performance of the proposed model is demonstrated on both synthetic and realworld data | [['we', 'present', 'a', 'probabilistic', 'modeling', 'and', 'inference', 'framework', 'for', 'discriminative', 'analysis', 'dictionary', 'learning', 'under', 'a', 'weak', 'supervision', 'setting', 'dictionary', 'learning', 'approaches', 'have', 'been', 'widely', 'used', 'for', 'tasks', 'such', 'as', 'lowlevel', 'signal', 'denoising', 'and', 'restoration', 'as', 'well', 'as', 'highlevel', 'classification', 'tasks', 'which', 'can', 'be', 'applied', 'to', 'audio', 'and', 'image', 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1,802.0171 | Rigidity of minimizers in nonlocal phase transitions II | In this paper we extend the results of \cite{S3} to the borderline case $s =
\frac 12$. We obtain the classification of global bounded solutions with
asymptotically flat level sets for semilinear nonlocal equations of the type
$$\Delta^{\frac 12} u=W'(u) \quad \text{in} \quad R^n,$$ where $W$ is a double
well potential.
| math.AP | in this paper we extend the results of cites3 to the borderline case s frac 12 we obtain the classification of global bounded solutions with asymptotically flat level sets for semilinear nonlocal equations of the type deltafrac 12 uwu quad textin quad rn where w is a double well potential | [['in', 'this', 'paper', 'we', 'extend', 'the', 'results', 'of', 'cites3', 'to', 'the', 'borderline', 'case', 's', 'frac', '12', 'we', 'obtain', 'the', 'classification', 'of', 'global', 'bounded', 'solutions', 'with', 'asymptotically', 'flat', 'level', 'sets', 'for', 'semilinear', 'nonlocal', 'equations', 'of', 'the', 'type', 'deltafrac', '12', 'uwu', 'quad', 'textin', 'quad', 'rn', 'where', 'w', 'is', 'a', 'double', 'well', 'potential']] | [-0.15411637981935422, 0.0073857438579505805, 0.09658895526081324, 0.012100526031904988, -0.05436787166043508, -0.2000081074918259, -0.03688466136239241, 0.25630940116789874, -0.27845368241625174, -0.1889635581803527, 0.14887847818614802, -0.4274208949004509, -0.09675422112685533, 0.16261019792445763, -0.08008569195790559, 0.07293473499618014, 0.01203974499842342, 0.041460829067081977, -0.09190603003514056, -0.25441847418491936, 0.37107042017944003, -0.13360467507522933, 0.18072819119623426, 0.032422989093679556, 0.07984109601119951, -0.024467582643336178, 0.05292769706789024, -0.03279923332132855, -0.29936504065610314, 0.030191856935354217, 0.20923404323355277, 0.034326626672124376, 0.2826160780933438, -0.36321560411276865, -0.1572186643713895, 0.2026548282034239, 0.1987940488877345, 0.0179803034442724, 0.00044830433302083797, -0.32962961855572553, 0.15541637455094226, -0.10300459328810779, -0.21699742532848398, -0.009319567691762837, 0.05728725191889977, 0.0953254040938859, -0.3639050562466894, 0.16019689031325432, 0.12744047416953788, -0.04882264002321326, -0.14628801667796715, -0.15389716001797696, -0.010298513641048754, 0.04183802367853267, -0.015733149444342266, 0.16179384204989053, -0.07390731663386128, -0.1271193202879584, -0.07184822030118382, 0.3635486410740687, -0.12363997455306198, -0.279213253199598, 0.1026991724264713, -0.21965735374322656, -0.16999510806814142, 0.011843433147486376, 0.12146435579170986, 0.22345335494574844, -0.10732705090955204, 0.2512374738877525, -0.06545576780122153, 0.1705979286807076, 0.11981831785595538, -0.004718937911093235, 0.019322671053208867, 0.17347725773496286, 0.12312767973967961, 0.11270580556224652, -0.08978692783465685, -0.04254264800752304, -0.3890065753794446, -0.11802012311788845, -0.04267971892365996, 0.17941608823531743, -0.08124781720226212, -0.16937953670870284, 0.3398346983523545, 0.05489973115677736, 0.1767152434557068, 0.1201741295600576, 0.14562573700154924, 0.14727899156586857, -0.05531362421354469, 0.11008696966063307, 0.14708921557164048, 0.09692570316244145, 0.15502676974069707, -0.20159698816548502, -0.08787125039475077, 0.10946562805549213] |
1,802.01711 | Discrete norming inequalities on sections of sphere, ball and torus | By discrete trigonometric norming inequalities on subintervals of the period,
we construct norming meshes with optimal cardinality growth for algebraic
polynomials on sections of sphere, ball and torus.
| math.NA | by discrete trigonometric norming inequalities on subintervals of the period we construct norming meshes with optimal cardinality growth for algebraic polynomials on sections of sphere ball and torus | [['by', 'discrete', 'trigonometric', 'norming', 'inequalities', 'on', 'subintervals', 'of', 'the', 'period', 'we', 'construct', 'norming', 'meshes', 'with', 'optimal', 'cardinality', 'growth', 'for', 'algebraic', 'polynomials', 'on', 'sections', 'of', 'sphere', 'ball', 'and', 'torus']] | [-0.15251167340569996, 0.0511967660526612, -0.07462628285533615, 0.06023588209479515, -0.10475771288786616, -0.1443612595487918, 0.052097160751665275, 0.3874248637418662, -0.30776937971157686, -0.13856847710641368, 0.17969012617998356, -0.28327309724409133, -0.02974880180720772, 0.24866693697445694, -0.16111761072118366, 0.17535878804379276, 0.05887287219853273, 0.039316256497321386, -0.08619647296810788, -0.351924175995269, 0.4042230582396899, -0.0509308838684644, 0.1340555488298248, -0.02659913694619068, 0.12206178457875337, 0.03439924041075366, -0.023685840113362895, -0.08214855064371866, -0.30109946988523006, 0.19201398444628076, 0.23135104916790233, 0.08911490639937776, 0.206713338947988, -0.38750915069665226, -0.0986710707324424, 0.16352825488762132, 0.13279626578358666, -0.1038402505884213, 0.020052087784279138, -0.25200071751273107, -0.02754204351055835, -0.04793560192255037, -0.21501465545900697, -0.10492826639009374, 0.12083725824153849, 0.11768687058481321, -0.33475454045193537, 0.04238247339214597, 0.03420567765299763, 0.15399477864100067, -0.08752586403196412, -0.15955592804571747, -0.010863501645092453, 0.011587151209823787, 0.020026702101209333, -0.001426348412808563, 0.07457717130559363, 0.07621876379874136, -0.15340878312209888, 0.355189475763057, -0.007101156449477587, -0.34467879722693134, 0.029377752116748264, -0.2230651861089947, -0.1623413633621697, 0.14230709256870405, 0.2168151894584298, 0.15022899316889898, -0.027344163407438567, 0.21770151571295823, -0.14059376613503055, 0.13353787612868473, 0.22996034679402197, 0.031901924505031536, 0.08714394989822592, 0.02514813980087638, 0.1525975508432436, 0.14289243379607797, 0.038138097896340435, -0.12558411893301777, -0.3588158284047885, -0.08992122504527547, -0.2303745069407991, 0.11068352444895677, -0.2691412508216412, -0.2642888921046896, 0.34659970718036803, -0.06757012984183218, 0.15332312020473182, 0.20088732306508714, 0.14637085675661052, 0.08513027775500502, 0.025839233786038158, 0.1006188616156578, 0.0851879275536963, 0.2088173695124819, -0.02594508869307382, -0.16498848343534128, -0.0008094325062951871, 0.33964126291019575] |
1,802.01712 | Some results on counting linearizations of posets | In section 1 we consider a 3-tuple $S=(|S|,\preccurlyeq,E)$ where $|S|$ is a
finite set, $\preccurlyeq$ a partial ordering on $|S|,$ and $E$ a set of
unordered pairs of distinct members of $|S|,$ and study, as a function of
$n\geq 0,$ the number of maps $\varphi:|S|\to\{1,\dots,n\}$ which are both
isotone with respect to the ordering $\preccurlyeq,$ and have the property that
$\varphi(x)\neq \varphi(y)$ whenever $\{x,y\}\in E.$ We prove a
number-theoretic result about this function, and use it in section 7 to recover
a ring-theoretic identity of G. P. Hochschild.
In section 2 we generalize a result of R. Stanley on the sign-imbalance of
posets in which the lengths of all maximal chains have the same parity.
In sections 3-6 we study the linearization-count and sign-imbalance of a
lexicographic sum of $n$ finite posets $P_i$ $(1\leq i\leq n)$ over an
$n$-element poset $P_0.$ We note how to compute these values from the
corresponding counts for the given posets $P_i,$ and for a lexicographic sum
over $P_0$ of chains of lengths $\mathrm{card}(P_i).$ This makes the behavior
of lexicographic sums of chains over a finite poset $P_0$ of interest, and we
obtain some general results on the linearization-count and sign-imbalance of
these objects.
| math.CO | in section 1 we consider a 3tuple sspreccurlyeqe where s is a finite set preccurlyeq a partial ordering on s and e a set of unordered pairs of distinct members of s and study as a function of ngeq 0 the number of maps varphisto1dotsn which are both isotone with respect to the ordering preccurlyeq and have the property that varphixneq varphiy whenever xyin e we prove a numbertheoretic result about this function and use it in section 7 to recover a ringtheoretic identity of g p hochschild in section 2 we generalize a result of r stanley on the signimbalance of posets in which the lengths of all maximal chains have the same parity in sections 36 we study the linearizationcount and signimbalance of a lexicographic sum of n finite posets p_i 1leq ileq n over an nelement poset p_0 we note how to compute these values from the corresponding counts for the given posets p_i and for a lexicographic sum over p_0 of chains of lengths mathrmcardp_i this makes the behavior of lexicographic sums of chains over a finite poset p_0 of interest and we obtain some general results on the linearizationcount and signimbalance of these objects | [['in', 'section', '1', 'we', 'consider', 'a', '3tuple', 'sspreccurlyeqe', 'where', 's', 'is', 'a', 'finite', 'set', 'preccurlyeq', 'a', 'partial', 'ordering', 'on', 's', 'and', 'e', 'a', 'set', 'of', 'unordered', 'pairs', 'of', 'distinct', 'members', 'of', 's', 'and', 'study', 'as', 'a', 'function', 'of', 'ngeq', '0', 'the', 'number', 'of', 'maps', 'varphisto1dotsn', 'which', 'are', 'both', 'isotone', 'with', 'respect', 'to', 'the', 'ordering', 'preccurlyeq', 'and', 'have', 'the', 'property', 'that', 'varphixneq', 'varphiy', 'whenever', 'xyin', 'e', 'we', 'prove', 'a', 'numbertheoretic', 'result', 'about', 'this', 'function', 'and', 'use', 'it', 'in', 'section', '7', 'to', 'recover', 'a', 'ringtheoretic', 'identity', 'of', 'g', 'p', 'hochschild', 'in', 'section', '2', 'we', 'generalize', 'a', 'result', 'of', 'r', 'stanley', 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1,802.01713 | Spot that Bird: A Location Based Bird Game | In today's age of pervasive computing and social media people make extensive
use of technology for communicating, sharing media and learning. Yet while in
the outdoors, on a hike or a trail we find ourselves inept of information about
the natural world surrounding us. In this paper I present in detail the design
and technological considerations required to build a location based mobile
application for learning about the avian taxonomy present in the user's
surroundings. It is designed to be a game for better engagement and learning.
The application makes suggestions for birds likely to be sighted in the
vicinity of the user and requires the user to spot those birds and upload a
photograph to the system. If spotted correctly the user scores points. I also
discuss some design methods and evaluation approaches for the application.
| cs.HC | in todays age of pervasive computing and social media people make extensive use of technology for communicating sharing media and learning yet while in the outdoors on a hike or a trail we find ourselves inept of information about the natural world surrounding us in this paper i present in detail the design and technological considerations required to build a location based mobile application for learning about the avian taxonomy present in the users surroundings it is designed to be a game for better engagement and learning the application makes suggestions for birds likely to be sighted in the vicinity of the user and requires the user to spot those birds and upload a photograph to the system if spotted correctly the user scores points i also discuss some design methods and evaluation approaches for the application | [['in', 'todays', 'age', 'of', 'pervasive', 'computing', 'and', 'social', 'media', 'people', 'make', 'extensive', 'use', 'of', 'technology', 'for', 'communicating', 'sharing', 'media', 'and', 'learning', 'yet', 'while', 'in', 'the', 'outdoors', 'on', 'a', 'hike', 'or', 'a', 'trail', 'we', 'find', 'ourselves', 'inept', 'of', 'information', 'about', 'the', 'natural', 'world', 'surrounding', 'us', 'in', 'this', 'paper', 'i', 'present', 'in', 'detail', 'the', 'design', 'and', 'technological', 'considerations', 'required', 'to', 'build', 'a', 'location', 'based', 'mobile', 'application', 'for', 'learning', 'about', 'the', 'avian', 'taxonomy', 'present', 'in', 'the', 'users', 'surroundings', 'it', 'is', 'designed', 'to', 'be', 'a', 'game', 'for', 'better', 'engagement', 'and', 'learning', 'the', 'application', 'makes', 'suggestions', 'for', 'birds', 'likely', 'to', 'be', 'sighted', 'in', 'the', 'vicinity', 'of', 'the', 'user', 'and', 'requires', 'the', 'user', 'to', 'spot', 'those', 'birds', 'and', 'upload', 'a', 'photograph', 'to', 'the', 'system', 'if', 'spotted', 'correctly', 'the', 'user', 'scores', 'points', 'i', 'also', 'discuss', 'some', 'design', 'methods', 'and', 'evaluation', 'approaches', 'for', 'the', 'application']] | [-0.05211323039371683, 0.01984887407331245, -0.05042373718027651, 0.07881973679415392, -0.16192293715031042, -0.17278570693706835, 0.10337775296541815, 0.42478466583211927, -0.21441301053906553, -0.33595310350077867, 0.10470443701687657, -0.3116289834104424, -0.19057712348409162, 0.17717005991390533, -0.1508260925919035, -0.014123111257132441, 0.05888175617658744, 0.09254575592387522, 0.01706618712841105, -0.27279009394021364, 0.29823276426398404, 0.05242709298686118, 0.28148733095068784, 0.07566257373491017, 0.07366530690002289, 0.0019883941570092946, -0.055088968987467894, -0.025142072142530097, -0.10465073626977901, 0.18023591880842935, 0.3351769610189146, 0.22458305294169997, 0.335237309951879, -0.4209462851829772, -0.17394039461076477, 0.07311719022079433, 0.14586737956494827, 0.0899206656184265, -0.07124373638733922, -0.3377456998275797, 0.08125169876364678, -0.19515581395354692, -0.10548561789353725, -0.052528997151568585, 0.0363288140196326, 0.00515581556148895, -0.26102321854636185, -0.04272795899071812, 0.006364952915613234, 0.1230844074357165, -0.04487358122710546, -0.06069226822914406, 0.05321677163732748, 0.22758265300042058, 0.05107500586135272, -0.02121111119835617, 0.18458344897826331, -0.1934163036304152, -0.11781783501896327, 0.4208937978956604, 0.024653038043991056, -0.1584059174774201, 0.20804927036009838, -0.08286071799858644, -0.12725467149195444, 0.06035086234018587, 0.24030046231269728, 0.08027035261361595, -0.16781668398747251, -0.01503729451418834, -0.021205456091267783, 0.16946771914261755, 0.05518423670386202, 0.00706921424461787, 0.22322583755811365, 0.21339682013435413, 0.07283251017823231, 0.07560789982625113, -0.06459934905300556, -0.09799153856715581, -0.19797683803808203, -0.18663973293613886, -0.14374292719141363, 0.019138221392734318, -0.07883510933978649, -0.11978283687834594, 0.3820889951035815, 0.25003739005892817, 0.1512970244240043, 0.040430732618636674, 0.3308380589256213, -0.010633308882315229, 0.07355732411608426, 0.12389174306656431, 0.1740927333872592, 0.012329539810953132, 0.22461816334220017, -0.15825479027309988, 0.12440322250311338, -0.024979572824753115] |
1,802.01714 | Shadow Symbolic Execution with Java PathFinder | Regression testing ensures that a software system when it evolves still
performs correctly and that the changes introduce no unintended side-effects.
However, the creation of regression test cases that show divergent behavior
needs a lot of effort. A solution is the idea of shadow symbolic execution,
originally implemented based on KLEE for programs written in C, which takes a
unifed version of the old and the new program and performs symbolic execution
guided by concrete values to explore the changed behavior. In this work, we
apply the idea of shadow symbolic execution to Java programs and, hence,
provide an extension of the Java PathFinder (JPF) project to perform shadow
symbolic execution on Java bytecode. The extension has been applied on several
subjects from the JPF test classes where it successfully generated test inputs
that expose divergences relevant for regression testing.
| cs.SE | regression testing ensures that a software system when it evolves still performs correctly and that the changes introduce no unintended sideeffects however the creation of regression test cases that show divergent behavior needs a lot of effort a solution is the idea of shadow symbolic execution originally implemented based on klee for programs written in c which takes a unifed version of the old and the new program and performs symbolic execution guided by concrete values to explore the changed behavior in this work we apply the idea of shadow symbolic execution to java programs and hence provide an extension of the java pathfinder jpf project to perform shadow symbolic execution on java bytecode the extension has been applied on several subjects from the jpf test classes where it successfully generated test inputs that expose divergences relevant for regression testing | [['regression', 'testing', 'ensures', 'that', 'a', 'software', 'system', 'when', 'it', 'evolves', 'still', 'performs', 'correctly', 'and', 'that', 'the', 'changes', 'introduce', 'no', 'unintended', 'sideeffects', 'however', 'the', 'creation', 'of', 'regression', 'test', 'cases', 'that', 'show', 'divergent', 'behavior', 'needs', 'a', 'lot', 'of', 'effort', 'a', 'solution', 'is', 'the', 'idea', 'of', 'shadow', 'symbolic', 'execution', 'originally', 'implemented', 'based', 'on', 'klee', 'for', 'programs', 'written', 'in', 'c', 'which', 'takes', 'a', 'unifed', 'version', 'of', 'the', 'old', 'and', 'the', 'new', 'program', 'and', 'performs', 'symbolic', 'execution', 'guided', 'by', 'concrete', 'values', 'to', 'explore', 'the', 'changed', 'behavior', 'in', 'this', 'work', 'we', 'apply', 'the', 'idea', 'of', 'shadow', 'symbolic', 'execution', 'to', 'java', 'programs', 'and', 'hence', 'provide', 'an', 'extension', 'of', 'the', 'java', 'pathfinder', 'jpf', 'project', 'to', 'perform', 'shadow', 'symbolic', 'execution', 'on', 'java', 'bytecode', 'the', 'extension', 'has', 'been', 'applied', 'on', 'several', 'subjects', 'from', 'the', 'jpf', 'test', 'classes', 'where', 'it', 'successfully', 'generated', 'test', 'inputs', 'that', 'expose', 'divergences', 'relevant', 'for', 'regression', 'testing']] | [-0.07567837671376765, -0.01667929279324848, -0.12996243415400385, 0.10030254993055548, -0.12987586375924626, -0.18221014051565101, 0.03426733318816072, 0.3498860642180911, -0.25232414456217417, -0.32515280090072857, 0.1419512848037162, -0.22191040153099623, -0.14334924433288895, 0.23334414086836788, -0.10310793555275138, 0.10111658858129106, 0.09963745126234634, 0.008658866807361066, -0.03672891989886661, -0.2864094149105118, 0.26968839249374077, 0.0725391431470468, 0.24769042448398457, 0.01137326778843999, 0.0985932370448219, 0.03752940794220194, -0.03437313960332956, 0.009862089643021526, -0.03727469689516251, 0.09601123158858432, 0.2917665317920702, 0.2691935721801461, 0.32118790526209134, -0.40353402591177395, -0.1481748345574098, 0.026450643385760485, 0.09544751798800592, 0.07113449712633155, -0.023344795934930777, -0.3010700615704991, 0.07881006549245545, -0.21701111309895557, -0.07987647986405395, -0.11245409822357552, 0.02800519972141566, -0.06501048716932668, -0.2558197592104859, -0.06270612368825823, 0.08716136848088354, 0.09842885139930461, 0.013242003634305936, -0.08585815168168795, -0.0012298580076146339, 0.13092149844596862, 0.07073705531490435, 0.043787186266854405, 0.1729593966588644, -0.05842843821904223, -0.17706669946201145, 0.3653325459720301, -0.03755926052773637, -0.18409334526097934, 0.18828098561914106, -0.051887538352249456, -0.19737431934835123, 0.09197420226035839, 0.20560158781840332, 0.11294148057100496, -0.15928401482243706, 0.11742360119408529, -0.033247215410561436, 0.2287859240447038, 0.08376454832697554, -0.06548418470857931, 0.18577866836317947, 0.17954455784222642, 0.008942902503102751, 0.21639384973262038, -0.029454224006206328, -0.10084458644767957, -0.2977010955767972, -0.18880303230668818, -0.14978501759635818, -0.02256465136140053, -0.045480231837219824, -0.20336127592516798, 0.40405673798730796, 0.21846973227802663, 0.10873102924254324, 0.1242743642543376, 0.33110032587179117, 0.04360468864906579, 0.13083749676672077, 0.13308409284135062, 0.14429793031969373, 0.004468068686713065, 0.1138140921248123, -0.2202262673144495, 0.14082271539872246, 0.04629547596144091] |
1,802.01715 | A Wilks' theorem for grouped data | Consider $n$ independent measurements, with the additional information of the
times at which measurements are performed. This paper deals with testing
statistical hypotheses when $n$ is large and only a small amount of
observations concentrated in short time intervals are relevant to the study. We
define a testing procedure in terms of multiple likelihood ratio (LR)
statistics obtained by splitting the observations into groups, and in
accordance with the following principles: P1) each LR statistic is formed by
gathering the data included in $G$ consecutive vectors of observations, where
$G$ is a suitable time window defined a priori with respect to an arbitrary
choice of the `origin of time'; P2) the null statistical hypothesis is rejected
only if at least $k$ LR statistics are sufficiently small, for a suitable
choice of $k$. We show that the application of the classical Wilks' theorem may
be affected by the arbitrary choice of the "origin of time", in connection with
P1). We then introduce a Wilks' theorem for grouped data which leads to a
testing procedure that overcomes the problem of the arbitrary choice of the
`origin of time', while fulfilling P1) and P2). Such a procedure is more
powerful than the corresponding procedure based on Wilks' theorem.
| stat.ME | consider n independent measurements with the additional information of the times at which measurements are performed this paper deals with testing statistical hypotheses when n is large and only a small amount of observations concentrated in short time intervals are relevant to the study we define a testing procedure in terms of multiple likelihood ratio lr statistics obtained by splitting the observations into groups and in accordance with the following principles p1 each lr statistic is formed by gathering the data included in g consecutive vectors of observations where g is a suitable time window defined a priori with respect to an arbitrary choice of the origin of time p2 the null statistical hypothesis is rejected only if at least k lr statistics are sufficiently small for a suitable choice of k we show that the application of the classical wilks theorem may be affected by the arbitrary choice of the origin of time in connection with p1 we then introduce a wilks theorem for grouped data which leads to a testing procedure that overcomes the problem of the arbitrary choice of the origin of time while fulfilling p1 and p2 such a procedure is more powerful than the corresponding procedure based on wilks theorem | [['consider', 'n', 'independent', 'measurements', 'with', 'the', 'additional', 'information', 'of', 'the', 'times', 'at', 'which', 'measurements', 'are', 'performed', 'this', 'paper', 'deals', 'with', 'testing', 'statistical', 'hypotheses', 'when', 'n', 'is', 'large', 'and', 'only', 'a', 'small', 'amount', 'of', 'observations', 'concentrated', 'in', 'short', 'time', 'intervals', 'are', 'relevant', 'to', 'the', 'study', 'we', 'define', 'a', 'testing', 'procedure', 'in', 'terms', 'of', 'multiple', 'likelihood', 'ratio', 'lr', 'statistics', 'obtained', 'by', 'splitting', 'the', 'observations', 'into', 'groups', 'and', 'in', 'accordance', 'with', 'the', 'following', 'principles', 'p1', 'each', 'lr', 'statistic', 'is', 'formed', 'by', 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1,802.01716 | A regularised Dean-Kawasaki model: derivation and analysis | The Dean-Kawasaki model consists of a nonlinear stochastic partial
differential equation featuring a conservative, multiplicative, stochastic term
with non-Lipschitz coefficient, and driven by space-time white noise; this
equation describes the evolution of the density function for a system of
finitely many particles governed by Langevin dynamics. Well-posedness for the
Dean-Kawasaki model is open except for specific diffusive cases, corresponding
to overdamped Langevin dynamics. There, it was recently shown by Lehmann,
Konarovskyi, and von Renesse that no regular (non-atomic) solutions exist. We
derive and analyse a suitably regularised Dean-Kawasaki model of wave equation
type driven by coloured noise, corresponding to second order Langevin dynamics,
in one space dimension. The regularisation can be interpreted as considering
particles of finite size rather than describing them by atomic measures. We
establish existence and uniqueness of a solution. Specifically, we prove a
high-probability result for the existence and uniqueness of mild solutions to
this regularised Dean-Kawasaki model.
| math.PR math-ph math.AP math.MP | the deankawasaki model consists of a nonlinear stochastic partial differential equation featuring a conservative multiplicative stochastic term with nonlipschitz coefficient and driven by spacetime white noise this equation describes the evolution of the density function for a system of finitely many particles governed by langevin dynamics wellposedness for the deankawasaki model is open except for specific diffusive cases corresponding to overdamped langevin dynamics there it was recently shown by lehmann konarovskyi and von renesse that no regular nonatomic solutions exist we derive and analyse a suitably regularised deankawasaki model of wave equation type driven by coloured noise corresponding to second order langevin dynamics in one space dimension the regularisation can be interpreted as considering particles of finite size rather than describing them by atomic measures we establish existence and uniqueness of a solution specifically we prove a highprobability result for the existence and uniqueness of mild solutions to this regularised deankawasaki model | [['the', 'deankawasaki', 'model', 'consists', 'of', 'a', 'nonlinear', 'stochastic', 'partial', 'differential', 'equation', 'featuring', 'a', 'conservative', 'multiplicative', 'stochastic', 'term', 'with', 'nonlipschitz', 'coefficient', 'and', 'driven', 'by', 'spacetime', 'white', 'noise', 'this', 'equation', 'describes', 'the', 'evolution', 'of', 'the', 'density', 'function', 'for', 'a', 'system', 'of', 'finitely', 'many', 'particles', 'governed', 'by', 'langevin', 'dynamics', 'wellposedness', 'for', 'the', 'deankawasaki', 'model', 'is', 'open', 'except', 'for', 'specific', 'diffusive', 'cases', 'corresponding', 'to', 'overdamped', 'langevin', 'dynamics', 'there', 'it', 'was', 'recently', 'shown', 'by', 'lehmann', 'konarovskyi', 'and', 'von', 'renesse', 'that', 'no', 'regular', 'nonatomic', 'solutions', 'exist', 'we', 'derive', 'and', 'analyse', 'a', 'suitably', 'regularised', 'deankawasaki', 'model', 'of', 'wave', 'equation', 'type', 'driven', 'by', 'coloured', 'noise', 'corresponding', 'to', 'second', 'order', 'langevin', 'dynamics', 'in', 'one', 'space', 'dimension', 'the', 'regularisation', 'can', 'be', 'interpreted', 'as', 'considering', 'particles', 'of', 'finite', 'size', 'rather', 'than', 'describing', 'them', 'by', 'atomic', 'measures', 'we', 'establish', 'existence', 'and', 'uniqueness', 'of', 'a', 'solution', 'specifically', 'we', 'prove', 'a', 'highprobability', 'result', 'for', 'the', 'existence', 'and', 'uniqueness', 'of', 'mild', 'solutions', 'to', 'this', 'regularised', 'deankawasaki', 'model']] | [-0.13334015555799278, 0.10632626548574894, -0.08718581063256256, 0.10457065560331102, -0.04067651112257552, -0.17154220029049994, -0.016409150030660003, 0.2741147722178874, -0.29119289472337667, -0.24574604217502238, 0.10117927559813804, -0.2813675564554471, -0.1582545489134071, 0.15770277189317553, -0.056607049767320096, 0.08120158204569873, 0.05426405909422197, 0.008639877540669036, -0.025671742052317745, -0.2074162669458402, 0.34641909460371706, -0.013352982490017129, 0.1936588947857289, -0.022636828380391785, 0.2073499331508126, 0.009982738985471721, -0.03104209140445547, 0.04416411741867945, -0.176353059098131, 0.0409154068681681, 0.18884147863565504, 0.03845333643747788, 0.28966600979727347, -0.399715342889785, -0.253988529175618, 0.12906666244472084, 0.1156016219561264, 0.11012820621315193, -0.05338111415192926, -0.3131610320461301, 0.06650124000474247, -0.1493790313405426, -0.2271360985928607, -0.09642682269546449, 0.049319002248873735, 0.07024538122411621, -0.2901716915290116, 0.16415007207787743, 0.11020928170948632, 0.0035718341021397223, -0.10905795498509083, -0.06718927889213726, -0.030364295040367563, 0.03319086642601944, 0.024343836404640523, -0.010581482889584118, 0.07883124455111101, -0.12423555615149733, -0.0860039675003224, 0.33897576318773454, -0.1444592179841014, -0.29717932096575267, 0.17520773783938862, -0.12143175759947074, -0.09681154453612276, 0.14064905844555287, 0.1268577660421694, 0.12053077424704832, -0.22607868412313492, 0.1386260741040276, -0.05682678140252201, 0.14734884059457967, 0.09774696540798207, -0.014529729207616152, 0.10506454014256106, 0.18298074233308925, 0.09706449473627513, 0.15497526239318846, -0.004582726588284315, -0.19273989760365925, -0.3187712529355562, -0.11063129275307322, -0.13530717995998107, 0.12214894956588596, -0.10816644892254676, -0.19169001920301143, 0.34360677235772047, 0.11544193536524529, 0.14765567642538563, 0.07039404035152218, 0.22329005738720298, 0.21469992457040413, -0.03773381948581358, 0.08365358403994162, 0.17069473971404428, 0.18554140754368795, 0.10203155070102136, -0.22103894128533857, 0.04851956588620516, 0.16449126087919516] |
1,802.01717 | Simultaneous Optimization of Signal Timing and Capacity Improvement in
Urban Transportation Networks Using Simulated Annealing | Capacity expansions as well as its reduction have been widely anticipated as
important countermeasures for traffic congestion. Although capacity expansion
had been traditionally well noticed as a congestion mitigation measure, but it
was not until recently that capacity reduction measures such as; congestion
pricing, road diet and other such capacity reduction measures were noticed as
congestion mitigation measures. Measures such as signal optimization, metering
and congestion pricing are intended to affect the travel pattern and assignment
behavior of travelers to make the results of the User Equilibrium (UE) traffic
assignment, followed by the travelers, closer to the System Optimal (SO)
outcomes, intended by the planners. As such, a bi-level optimization model was
formulated for the simultaneous optimization of capacity improvement/expansion
and signal timing in an urban transportation network. The model takes into
account both the effect of higher demand, induced by the capacity expansion,
and the rerouting potential effect of traffic signals. The solution algorithm
developed here consists of two major components; the gradient projection
algorithm (GP) to solve the lower level traffic assignment problem and the
Simulated Annealing (SA) algorithm to solve the master problem. In order to
illustrate the method a case study was examined. The analysis and application
of the proposed algorithm shows that the performance function gradually
converged along the simulation run, and no divergence problem is observed. By
applying the developed algorithm, the total network travel time reduced by
13.42%, in which 5.76% is reached by only optimizing the signal times. Using
the GP algorithm and taking advantages of dynamic memory in the process of
simulation, the whole simulation acquired from computer time is 13.63 seconds
with a convergence rate of 0.001.
| cs.SY | capacity expansions as well as its reduction have been widely anticipated as important countermeasures for traffic congestion although capacity expansion had been traditionally well noticed as a congestion mitigation measure but it was not until recently that capacity reduction measures such as congestion pricing road diet and other such capacity reduction measures were noticed as congestion mitigation measures measures such as signal optimization metering and congestion pricing are intended to affect the travel pattern and assignment behavior of travelers to make the results of the user equilibrium ue traffic assignment followed by the travelers closer to the system optimal so outcomes intended by the planners as such a bilevel optimization model was formulated for the simultaneous optimization of capacity improvementexpansion and signal timing in an urban transportation network the model takes into account both the effect of higher demand induced by the capacity expansion and the rerouting potential effect of traffic signals the solution algorithm developed here consists of two major components the gradient projection algorithm gp to solve the lower level traffic assignment problem and the simulated annealing sa algorithm to solve the master problem in order to illustrate the method a case study was examined the analysis and application of the proposed algorithm shows that the performance function gradually converged along the simulation run and no divergence problem is observed by applying the developed algorithm the total network travel time reduced by 1342 in which 576 is reached by only optimizing the signal times using the gp algorithm and taking advantages of dynamic memory in the process of simulation the whole simulation acquired from computer time is 1363 seconds with a convergence rate of 0001 | [['capacity', 'expansions', 'as', 'well', 'as', 'its', 'reduction', 'have', 'been', 'widely', 'anticipated', 'as', 'important', 'countermeasures', 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1,802.01718 | A Bayesian Nonparametric Approach to Dynamical Noise Reduction | We propose a Bayesian nonparametric approach for the noise reduction of a
given chaotic time series contaminated by dynamical noise, based on Markov
Chain Monte Carlo methods (MCMC). The underlying unknown noise process
(possibly) exhibits heavy tailed behavior. We introduce the Dynamic Noise
Reduction Replicator (DNRR) model with which we reconstruct the unknown dynamic
equations and in parallel we replicate the dynamics under reduced noise level
dynamical perturbations. The dynamic noise reduction procedure is demonstrated
specifically in the case of polynomial maps. Simulations based on synthetic
time series are presented.
| stat.ME nlin.CD | we propose a bayesian nonparametric approach for the noise reduction of a given chaotic time series contaminated by dynamical noise based on markov chain monte carlo methods mcmc the underlying unknown noise process possibly exhibits heavy tailed behavior we introduce the dynamic noise reduction replicator dnrr model with which we reconstruct the unknown dynamic equations and in parallel we replicate the dynamics under reduced noise level dynamical perturbations the dynamic noise reduction procedure is demonstrated specifically in the case of polynomial maps simulations based on synthetic time series are presented | [['we', 'propose', 'a', 'bayesian', 'nonparametric', 'approach', 'for', 'the', 'noise', 'reduction', 'of', 'a', 'given', 'chaotic', 'time', 'series', 'contaminated', 'by', 'dynamical', 'noise', 'based', 'on', 'markov', 'chain', 'monte', 'carlo', 'methods', 'mcmc', 'the', 'underlying', 'unknown', 'noise', 'process', 'possibly', 'exhibits', 'heavy', 'tailed', 'behavior', 'we', 'introduce', 'the', 'dynamic', 'noise', 'reduction', 'replicator', 'dnrr', 'model', 'with', 'which', 'we', 'reconstruct', 'the', 'unknown', 'dynamic', 'equations', 'and', 'in', 'parallel', 'we', 'replicate', 'the', 'dynamics', 'under', 'reduced', 'noise', 'level', 'dynamical', 'perturbations', 'the', 'dynamic', 'noise', 'reduction', 'procedure', 'is', 'demonstrated', 'specifically', 'in', 'the', 'case', 'of', 'polynomial', 'maps', 'simulations', 'based', 'on', 'synthetic', 'time', 'series', 'are', 'presented']] | [-0.11178073737149437, 0.09278089319252306, -0.12507078513089154, 0.11726740143828161, -0.023906254390668537, -0.16300832362483358, 0.041680021221852964, 0.3981696418590016, -0.30941866478986213, -0.2707995935498426, 0.11783134947375705, -0.22138088502817685, -0.20543228920238712, 0.15998395173034322, -0.08370161389725075, 0.11157762743532658, 0.07667281196142237, -0.045442971411264604, -0.06172844509387182, -0.2606305629364215, 0.2804214695778986, 0.090585906824304, 0.2730002098095914, -0.14010382457442272, 0.1836860472853813, 0.02250231942679319, -0.10101721023933755, -0.002010927509723438, -0.10430686338287261, 0.0575917659741309, 0.199254495314704, 0.08310757866129279, 0.2732916913098759, -0.41958405806993443, -0.2542046848141278, 0.13544321497902273, 0.10193335158853895, 0.1478572915941994, -0.04453134105230371, -0.3045847838718651, 0.048499027950068316, -0.14169503463846114, -0.0852937416302868, -0.13869693574185174, -0.06573407456485761, 0.019203067464857466, -0.32299884381807514, 0.13316755080336912, 0.047816627904022524, 0.09228929239842627, -0.003249940514150593, -0.11878370184761783, 0.04312638756301668, 0.057672366418410094, 0.013169610932042513, -0.057849512154482204, 0.1815724541950557, -0.06794704018781582, -0.14299579774055424, 0.3026545214984152, -0.1404359170002863, -0.26349368174042964, 0.18468951500641803, -0.11693704912128548, -0.20169053457987804, 0.19981608403743142, 0.21298659215163854, 0.10558670684695244, -0.19146260318035882, 0.11587369940696388, 0.037551281342489855, 0.18293645272626438, -0.016209311206411156, -0.04359777704295185, 0.099988534161821, 0.243970269523561, 0.04778281115512881, 0.1894112926390436, -0.14371498847613112, -0.1737571973948636, -0.2461301857437421, -0.05130229753235148, -0.18683220847613283, 0.039501921783408354, -0.13226769163464067, -0.2270396076142788, 0.38138705542724993, 0.23391907548422952, 0.17074065508010486, 0.08559442840827008, 0.3237756524855892, 0.16522898582948578, -0.06200385975858404, 0.07659472019618584, 0.09123014166123337, 0.12633076810226257, 0.08960557008912373, -0.256020907473026, 0.12595075286096996, 0.034752612788644104] |
1,802.01719 | Cross-Layer Authentication Protocol Design for Ultra-Dense 5G HetNets | Creating a secure environment for communications is becoming a significantly
challenging task in 5G Heterogeneous Networks (HetNets) given the stringent
latency and high capacity requirements of 5G networks. This is particularly
factual knowing that the infrastructure tends to be highly diversified
especially with the continuous deployment of small cells. In fact, frequent
handovers in these cells introduce unnecessarily recurring authentications
leading to increased latency. In this paper, we propose a software-defined
wireless network (SDWN)-enabled fast cross-authentication scheme which combines
non-cryptographic and cryptographic algorithms to address the challenges of
latency and weak security. Initially, the received radio signal strength
vectors at the mobile terminal (MT) is used as a fingerprinting source to
generate an unpredictable secret key. Subsequently, a cryptographic mechanism
based upon the authentication and key agreement protocol by employing the
generated secret key is performed in order to improve the confidentiality and
integrity of the authentication handover. Further, we propose a radio trusted
zone database aiming to enhance the frequent authentication of radio devices
which are present in the network. In order to reduce recurring authentications,
a given covered area is divided into trusted zones where each zone contains
more than one small cell, thus permitting the MT to initiate a single
authentication request per zone, even if it keeps roaming between different
cells. The proposed scheme is analyzed under different attack scenarios and its
complexity is compared with cryptographic and non-cryptographic approaches to
demonstrate its security resilience and computational efficiency.
| cs.CR cs.NI | creating a secure environment for communications is becoming a significantly challenging task in 5g heterogeneous networks hetnets given the stringent latency and high capacity requirements of 5g networks this is particularly factual knowing that the infrastructure tends to be highly diversified especially with the continuous deployment of small cells in fact frequent handovers in these cells introduce unnecessarily recurring authentications leading to increased latency in this paper we propose a softwaredefined wireless network sdwnenabled fast crossauthentication scheme which combines noncryptographic and cryptographic algorithms to address the challenges of latency and weak security initially the received radio signal strength vectors at the mobile terminal mt is used as a fingerprinting source to generate an unpredictable secret key subsequently a cryptographic mechanism based upon the authentication and key agreement protocol by employing the generated secret key is performed in order to improve the confidentiality and integrity of the authentication handover further we propose a radio trusted zone database aiming to enhance the frequent authentication of radio devices which are present in the network in order to reduce recurring authentications a given covered area is divided into trusted zones where each zone contains more than one small cell thus permitting the mt to initiate a single authentication request per zone even if it keeps roaming between different cells the proposed scheme is analyzed under different attack scenarios and its complexity is compared with cryptographic and noncryptographic approaches to demonstrate its security resilience and computational efficiency | [['creating', 'a', 'secure', 'environment', 'for', 'communications', 'is', 'becoming', 'a', 'significantly', 'challenging', 'task', 'in', '5g', 'heterogeneous', 'networks', 'hetnets', 'given', 'the', 'stringent', 'latency', 'and', 'high', 'capacity', 'requirements', 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1,802.0172 | Photoproduction of the $\Lambda$(1405) Hyperon | We propose to use the high current photon beam available at A2 to produce the
isosinglet $\Lambda(1405)1/2^-$ hyperon at threshold via $\gamma p\rightarrow
K^+\Lambda(1405)$. Its nature is still controversial and actively debated.
Since the only available photoproduction data from CLAS are lacking in
precision in the $\Sigma^0\pi^0$ decay channel, we propose a new independent
measurement of this most important pure $I = 0$ final state including the
unmeasured beam-helicity observable $I^\odot$. In addition, the excellent
photon detection acceptance of the A2 setup will offer the opportunity for a
first measurement of the radiative decays of the $\Lambda(1405)$, which will
provide clean and stringent constraints for model descriptions in terms of,
e.g., unitary chiral perturbation theory.
| nucl-ex | we propose to use the high current photon beam available at a2 to produce the isosinglet lambda140512 hyperon at threshold via gamma prightarrow klambda1405 its nature is still controversial and actively debated since the only available photoproduction data from clas are lacking in precision in the sigma0pi0 decay channel we propose a new independent measurement of this most important pure i 0 final state including the unmeasured beamhelicity observable iodot in addition the excellent photon detection acceptance of the a2 setup will offer the opportunity for a first measurement of the radiative decays of the lambda1405 which will provide clean and stringent constraints for model descriptions in terms of eg unitary chiral perturbation theory | [['we', 'propose', 'to', 'use', 'the', 'high', 'current', 'photon', 'beam', 'available', 'at', 'a2', 'to', 'produce', 'the', 'isosinglet', 'lambda140512', 'hyperon', 'at', 'threshold', 'via', 'gamma', 'prightarrow', 'klambda1405', 'its', 'nature', 'is', 'still', 'controversial', 'and', 'actively', 'debated', 'since', 'the', 'only', 'available', 'photoproduction', 'data', 'from', 'clas', 'are', 'lacking', 'in', 'precision', 'in', 'the', 'sigma0pi0', 'decay', 'channel', 'we', 'propose', 'a', 'new', 'independent', 'measurement', 'of', 'this', 'most', 'important', 'pure', 'i', '0', 'final', 'state', 'including', 'the', 'unmeasured', 'beamhelicity', 'observable', 'iodot', 'in', 'addition', 'the', 'excellent', 'photon', 'detection', 'acceptance', 'of', 'the', 'a2', 'setup', 'will', 'offer', 'the', 'opportunity', 'for', 'a', 'first', 'measurement', 'of', 'the', 'radiative', 'decays', 'of', 'the', 'lambda1405', 'which', 'will', 'provide', 'clean', 'and', 'stringent', 'constraints', 'for', 'model', 'descriptions', 'in', 'terms', 'of', 'eg', 'unitary', 'chiral', 'perturbation', 'theory']] | [-0.07361463979785249, 0.18367234909122712, -0.07810237346903275, 0.0867867830307468, -0.06429891079549857, -0.17929118935819388, 0.06412137095130195, 0.34326346842735483, -0.21117910475719295, -0.26345160446668925, 0.04026758319314308, -0.30013032453624827, 0.0006889751091141973, 0.1320580193433878, 0.0248344540228381, 0.10014921518858612, 0.08525413862968746, 0.05446452957709737, -0.02287893836272129, -0.16567062122620674, 0.2993230677757151, 0.08834522719527677, 0.25025520008670066, 0.10486203979235142, 0.06857718271713932, 0.02437677150265428, -0.050851581291665254, -0.10744297246268966, -0.1537806177368845, 0.08338874811051299, 0.2647628825027169, 0.12465638230321674, 0.1717399990741621, -0.38862848629063945, -0.12329935467507887, 0.10120060951694061, 0.16603941188064678, 0.1167102421321416, -0.07240795196246422, -0.3000474397599566, 0.06998170496846892, -0.19918202552862727, -0.0968141918838547, -0.09389205417072956, 0.027252485132122643, -0.06341227303308092, -0.30185662431687343, 0.08092987192018579, -0.0235075522234598, 0.024683376684327397, -0.027806825001454472, -0.1878629393891938, 0.0272585446782933, 0.09811094889351935, 0.048628840944729745, 0.07037322101154643, 0.12371402591254496, -0.18993812278137756, -0.11165558128299094, 0.37519304284401106, -0.058315457102205405, -0.16003637551738506, 0.1520232109219171, -0.21345894651797911, -0.19302421473293452, 0.14850156834316358, 0.1842968632378248, 0.09231018206602976, -0.17648957929933412, 0.07187406029123322, -0.01317334727367811, 0.15722380701775188, 0.03570634130339481, 0.09951872819536284, 0.18136943851417878, 0.20464226142952643, -0.013317457579991273, 0.08379460256873515, -0.11808895959780273, -0.03259620866983345, -0.38140473897944677, -0.10039044031873345, -0.10270521765076474, 0.08951218205344814, 0.005665349237173551, -0.08319339825130444, 0.3515936293304293, 0.13207683026006348, 0.19756852418976723, -0.02238078041741494, 0.3378317216411233, 0.0780393910602454, 0.030389429106818217, 0.023885776100908977, 0.31525207950484435, 0.1433556849553593, 0.10672600669255317, -0.2272514022351651, 0.08580075418489798, -0.045626684077688606] |
1,802.01721 | Sensitivity of Proposed Search for Axion-induced Magnetic Field using
Optically Pumped Magnetometers | We investigate a search for the oscillating current induced by axion dark
matter in an external magnetic field using optically pumped magnetometers
(OPMs). This experiment is based upon the LC circuit axion detection concept of
Sikivie, Sullivan, and Tanner. The modification of Maxwell's equations caused
by the axion-photon coupling results in a minute oscillating magnetic field at
the frequency equal to the axion mass in the presence of magnetic field. This
induced magnetic field could be searched for using an LC circuit amplifier with
an OPM, the most sensitive cryogen-free magnetic-field sensor, in a room
temperature experiment, avoiding the need for a complicated and expensive
cryogenic system. We discuss how an existing magnetic resonance imaging (MRI)
experiment can be modified to search for axions in a previously unexplored part
of the parameter space. Our existing detection setup, optimized for MRI, is
already sensitive to an axion-photon coupling of $10^{-7}$ GeV$^{-1}$ for an
axion mass near $3\times10^{-10}$ eV. While this is ruled out by limits from
astrophysics and solar axion searches, we show that realistic modifications,
and optimization of the experiment for axion detection, can set a new limit on
the axion-photon coupling up to three orders of magnitude beyond the current
best limit, for axion masses between $10^{-11}$ eV and $10^{-7}$ eV.ion masses
between $10^{-11}$ eV and $10^{-7}$ eV.
| physics.ins-det nucl-ex | we investigate a search for the oscillating current induced by axion dark matter in an external magnetic field using optically pumped magnetometers opms this experiment is based upon the lc circuit axion detection concept of sikivie sullivan and tanner the modification of maxwells equations caused by the axionphoton coupling results in a minute oscillating magnetic field at the frequency equal to the axion mass in the presence of magnetic field this induced magnetic field could be searched for using an lc circuit amplifier with an opm the most sensitive cryogenfree magneticfield sensor in a room temperature experiment avoiding the need for a complicated and expensive cryogenic system we discuss how an existing magnetic resonance imaging mri experiment can be modified to search for axions in a previously unexplored part of the parameter space our existing detection setup optimized for mri is already sensitive to an axionphoton coupling of 107 gev1 for an axion mass near 3times1010 ev while this is ruled out by limits from astrophysics and solar axion searches we show that realistic modifications and optimization of the experiment for axion detection can set a new limit on the axionphoton coupling up to three orders of magnitude beyond the current best limit for axion masses between 1011 ev and 107 evion masses between 1011 ev and 107 ev | [['we', 'investigate', 'a', 'search', 'for', 'the', 'oscillating', 'current', 'induced', 'by', 'axion', 'dark', 'matter', 'in', 'an', 'external', 'magnetic', 'field', 'using', 'optically', 'pumped', 'magnetometers', 'opms', 'this', 'experiment', 'is', 'based', 'upon', 'the', 'lc', 'circuit', 'axion', 'detection', 'concept', 'of', 'sikivie', 'sullivan', 'and', 'tanner', 'the', 'modification', 'of', 'maxwells', 'equations', 'caused', 'by', 'the', 'axionphoton', 'coupling', 'results', 'in', 'a', 'minute', 'oscillating', 'magnetic', 'field', 'at', 'the', 'frequency', 'equal', 'to', 'the', 'axion', 'mass', 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1,802.01722 | Compressive Light Field Reconstructions using Deep Learning | Light field imaging is limited in its computational processing demands of
high sampling for both spatial and angular dimensions. Single-shot light field
cameras sacrifice spatial resolution to sample angular viewpoints, typically by
multiplexing incoming rays onto a 2D sensor array. While this resolution can be
recovered using compressive sensing, these iterative solutions are slow in
processing a light field. We present a deep learning approach using a new, two
branch network architecture, consisting jointly of an autoencoder and a 4D CNN,
to recover a high resolution 4D light field from a single coded 2D image. This
network decreases reconstruction time significantly while achieving average
PSNR values of 26-32 dB on a variety of light fields. In particular,
reconstruction time is decreased from 35 minutes to 6.7 minutes as compared to
the dictionary method for equivalent visual quality. These reconstructions are
performed at small sampling/compression ratios as low as 8%, allowing for
cheaper coded light field cameras. We test our network reconstructions on
synthetic light fields, simulated coded measurements of real light fields
captured from a Lytro Illum camera, and real coded images from a custom CMOS
diffractive light field camera. The combination of compressive light field
capture with deep learning allows the potential for real-time light field video
acquisition systems in the future.
| cs.CV | light field imaging is limited in its computational processing demands of high sampling for both spatial and angular dimensions singleshot light field cameras sacrifice spatial resolution to sample angular viewpoints typically by multiplexing incoming rays onto a 2d sensor array while this resolution can be recovered using compressive sensing these iterative solutions are slow in processing a light field we present a deep learning approach using a new two branch network architecture consisting jointly of an autoencoder and a 4d cnn to recover a high resolution 4d light field from a single coded 2d image this network decreases reconstruction time significantly while achieving average psnr values of 2632 db on a variety of light fields in particular reconstruction time is decreased from 35 minutes to 67 minutes as compared to the dictionary method for equivalent visual quality these reconstructions are performed at small samplingcompression ratios as low as 8 allowing for cheaper coded light field cameras we test our network reconstructions on synthetic light fields simulated coded measurements of real light fields captured from a lytro illum camera and real coded images from a custom cmos diffractive light field camera the combination of compressive light field capture with deep learning allows the potential for realtime light field video acquisition systems in the future | [['light', 'field', 'imaging', 'is', 'limited', 'in', 'its', 'computational', 'processing', 'demands', 'of', 'high', 'sampling', 'for', 'both', 'spatial', 'and', 'angular', 'dimensions', 'singleshot', 'light', 'field', 'cameras', 'sacrifice', 'spatial', 'resolution', 'to', 'sample', 'angular', 'viewpoints', 'typically', 'by', 'multiplexing', 'incoming', 'rays', 'onto', 'a', '2d', 'sensor', 'array', 'while', 'this', 'resolution', 'can', 'be', 'recovered', 'using', 'compressive', 'sensing', 'these', 'iterative', 'solutions', 'are', 'slow', 'in', 'processing', 'a', 'light', 'field', 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1,802.01723 | High Kinetic Inductance NbN Nanowire Superinductors | We demonstrate that a high kinetic inductance disordered superconductor can
realize a low microwave loss, non-dissipative circuit element with an impedance
greater than the quantum resistance ($R_Q = h/4e^2 \simeq 6.5k\Omega$). This
element, known as a superinductor, can produce a quantum circuit where charge
fluctuations are suppressed. The superinductor consists of a 40 nm wide niobium
nitride nanowire and exhibits a single photon quality factor of $2.5 \times
10^4$. Furthermore, by examining loss rates, we demonstrate that the
dissipation of our nanowire devices can be fully understood in the framework of
two-level system loss.
| cond-mat.mes-hall | we demonstrate that a high kinetic inductance disordered superconductor can realize a low microwave loss nondissipative circuit element with an impedance greater than the quantum resistance r_q h4e2 simeq 65komega this element known as a superinductor can produce a quantum circuit where charge fluctuations are suppressed the superinductor consists of a 40 nm wide niobium nitride nanowire and exhibits a single photon quality factor of 25 times 104 furthermore by examining loss rates we demonstrate that the dissipation of our nanowire devices can be fully understood in the framework of twolevel system loss | [['we', 'demonstrate', 'that', 'a', 'high', 'kinetic', 'inductance', 'disordered', 'superconductor', 'can', 'realize', 'a', 'low', 'microwave', 'loss', 'nondissipative', 'circuit', 'element', 'with', 'an', 'impedance', 'greater', 'than', 'the', 'quantum', 'resistance', 'r_q', 'h4e2', 'simeq', '65komega', 'this', 'element', 'known', 'as', 'a', 'superinductor', 'can', 'produce', 'a', 'quantum', 'circuit', 'where', 'charge', 'fluctuations', 'are', 'suppressed', 'the', 'superinductor', 'consists', 'of', 'a', '40', 'nm', 'wide', 'niobium', 'nitride', 'nanowire', 'and', 'exhibits', 'a', 'single', 'photon', 'quality', 'factor', 'of', '25', 'times', '104', 'furthermore', 'by', 'examining', 'loss', 'rates', 'we', 'demonstrate', 'that', 'the', 'dissipation', 'of', 'our', 'nanowire', 'devices', 'can', 'be', 'fully', 'understood', 'in', 'the', 'framework', 'of', 'twolevel', 'system', 'loss']] | [-0.19062973878032569, 0.21287747103681043, 0.012261627626645824, -0.027115141017534566, 0.024060802303922726, -0.19667465302652842, 0.04285248073384813, 0.3926415788617147, -0.20602338518137517, -0.32098008827913715, -0.009887248573605852, -0.3161038914796613, -0.08733878496264957, 0.24842931436939145, -0.059405248957615266, 0.05222500302909833, 0.02496947905899066, -0.04484414561580786, -0.0845125879998744, -0.17332367072990368, 0.22009193241272285, 0.05219149988134513, 0.35107543708189676, 0.0755012631871859, 0.13542768496858038, -0.1094545892556198, 0.13522678940131774, 0.039194835584646134, -0.1114712686705942, 0.04573898140907935, 0.2542648953385651, -0.0372057545768178, 0.24049842734213756, -0.44630989791703934, -0.24163629040729417, 0.029453052087616095, 0.14946587645681575, 0.11637077443858447, -0.03958203845515685, -0.2182615969770426, 0.1186411039215391, -0.21804384861151566, -0.08591661839881967, -0.04371916653294845, -0.03493854335196691, -0.041381975868716836, -0.28202304116996896, 0.08514190818507063, 0.029510568584436955, 0.03882640126444723, 0.05158571497351817, -0.07791864118189551, -0.01471209858857986, 0.015299370967904511, -0.09319039098424939, 0.03583354201881499, 0.23874815151540804, -0.11580242701229113, -0.11766559185343795, 0.32964744500856363, -0.09839241792344736, -0.1255303136093299, 0.12154352716828251, -0.1518104659879337, 0.043215999809984605, 0.15895666662887062, 0.127318306074417, 0.08359355758875608, -0.16519426250749308, 0.046206930770890525, 0.032031186011052974, 0.25647614287647785, 0.05932172377462215, 0.12302780492514696, 0.21300713587349848, 0.2510433630896327, 0.011686179063120939, 0.1716162951058283, -0.09946082642747332, 0.0035912865043982215, -0.2831646366571279, -0.18622078788947596, -0.201851648926411, 0.15965596489537426, -0.13156651275763262, -0.1964230922293728, 0.37626011374042084, 0.1395224610839606, 0.1927534729120848, -0.003627446871099022, 0.3026920305514384, 0.17260583999829934, 0.1048774499365169, 0.041998127586734685, 0.26165849410007586, 0.15983769462858935, 0.08247831196564695, -0.2680538238238786, 0.030959945994571015, -0.04502674504993078] |
1,802.01724 | Massive stars in the SDSS-IV/APOGEE SURVEY. I- OB stars | In this work we make use of DR14 APOGEE spectroscopic data to study a sample
of 92 known OB stars. We developed a near-infrared semi-empirical spectral
classification method that was successfully used in case of four new exemplars,
previously classified as later B-type stars. Our results agree well with those
determined independently from ECHELLE optical spectra, being in line with the
spectral types derived from the "canonical" MK blue optical system. This
confirms that the APOGEE spectrograph can also be used as a powerful tool in
surveys aiming to unveil and study large number of moderately and highly
obscured OB stars still hidden in the Galaxy.
| astro-ph.GA | in this work we make use of dr14 apogee spectroscopic data to study a sample of 92 known ob stars we developed a nearinfrared semiempirical spectral classification method that was successfully used in case of four new exemplars previously classified as later btype stars our results agree well with those determined independently from echelle optical spectra being in line with the spectral types derived from the canonical mk blue optical system this confirms that the apogee spectrograph can also be used as a powerful tool in surveys aiming to unveil and study large number of moderately and highly obscured ob stars still hidden in the galaxy | [['in', 'this', 'work', 'we', 'make', 'use', 'of', 'dr14', 'apogee', 'spectroscopic', 'data', 'to', 'study', 'a', 'sample', 'of', '92', 'known', 'ob', 'stars', 'we', 'developed', 'a', 'nearinfrared', 'semiempirical', 'spectral', 'classification', 'method', 'that', 'was', 'successfully', 'used', 'in', 'case', 'of', 'four', 'new', 'exemplars', 'previously', 'classified', 'as', 'later', 'btype', 'stars', 'our', 'results', 'agree', 'well', 'with', 'those', 'determined', 'independently', 'from', 'echelle', 'optical', 'spectra', 'being', 'in', 'line', 'with', 'the', 'spectral', 'types', 'derived', 'from', 'the', 'canonical', 'mk', 'blue', 'optical', 'system', 'this', 'confirms', 'that', 'the', 'apogee', 'spectrograph', 'can', 'also', 'be', 'used', 'as', 'a', 'powerful', 'tool', 'in', 'surveys', 'aiming', 'to', 'unveil', 'and', 'study', 'large', 'number', 'of', 'moderately', 'and', 'highly', 'obscured', 'ob', 'stars', 'still', 'hidden', 'in', 'the', 'galaxy']] | [0.017612573018578707, 0.06981024998328034, -0.10105354362167418, 0.06936960429049817, -0.11808801430084233, -0.10761864808001467, 0.07706287592860325, 0.4221529378292133, -0.14741016326489736, -0.38407644889985193, 0.04334117885556002, -0.27563172356084975, -0.09641799959793405, 0.26265035101810014, -0.07737906593477951, 0.011820106398103372, 0.11009482936801845, -0.06297301810964029, 0.019829417047319265, -0.284862905749524, 0.30126367737802695, 0.059219144697670104, 0.18387024449008815, -0.10217802953809711, 0.015313193409589454, -0.09085954695650078, -0.13384420722162896, 0.028951387195672206, -0.1317231855395015, 0.08742260163537895, 0.2961165178215729, 0.13299807088607746, 0.21238849914790886, -0.30909760624909155, -0.19479756926203956, 0.0526845918206129, 0.2165018255615888, 0.08761898268295347, -0.05121299063013691, -0.2810916903248619, 0.09638593714442083, -0.1659194839819563, -0.18636244473065128, -0.04480957242062772, -0.020775984832138387, 0.06303292735181046, -0.20790129755008616, 0.03593962355423499, -0.008993961853809865, 0.16315474778079903, -0.12566004194102892, -0.14452093046483636, -0.05110988386836395, 0.14217732680241033, -0.02695586845138163, 0.05105991134824196, 0.05922621935781724, -0.11638580210823214, -0.05331805002225457, 0.39448402138462046, -0.13112929900712772, 0.005875015533847717, 0.22905505372800003, -0.17074345085848966, -0.20967645092234719, 0.10390918990948571, 0.15162025909115262, 0.19431607561067343, -0.22642582376434836, -0.001546242387464516, -0.04790040468445645, 0.2055480912215744, 0.03601072241007438, 0.07719778179705587, 0.24512146782340868, 0.12231696619353485, -0.039801426763417865, 0.1400263986982985, -0.23027359124027053, -0.001507655344024863, -0.21181016844996023, -0.10409629295738239, -0.16998429018960176, 0.06792196108441237, -0.08457747701844333, -0.11741450145172905, 0.365187352145407, 0.12046214566513333, 0.2343544682997437, 0.01878876927010012, 0.30212030139804447, 0.04074631159892306, 0.1291720382210289, 0.07691237065097634, 0.30008638144101735, 0.20395706948947231, 0.13538980741440407, -0.2052058105067051, 0.016858491304172378, 0.03176811968914303] |
1,802.01725 | State-of-the-Art Survey on In-Vehicle Network Communication (CAN-Bus)
Security and Vulnerabilities | Nowadays with the help of advanced technology, modern vehicles are not only
made up of mechanical devices but also consist of highly complex electronic
devices and connections to the outside world. There are around 70 Electronic
Control Units (ECUs) in modern vehicle which are communicating with each other
over the standard communication protocol known as Controller Area Network
(CAN-Bus) that provides the communication rate up to 1Mbps. There are different
types of in-vehicle network protocol and bus system namely Controlled Area
Network (CAN), Local Interconnected Network (LIN), Media Oriented System
Transport (MOST), and FlexRay. Even though CAN-Bus is considered as de-facto
standard for in-vehicle network communication, it inherently lacks the
fundamental security features by design like message authentication. This
security limitation has paved the way for adversaries to penetrate into the
vehicle network and do malicious activities which can pose a dangerous
situation for both driver and passengers. In particular, nowadays vehicular
networks are not only closed systems, but also they are open to different
external interfaces namely Bluetooth, GPS, to the outside world. Therefore, it
creates new opportunities for attackers to remotely take full control of the
vehicle. The objective of this research is to survey the current limitations of
CAN-Bus protocol in terms of secure communication and different solutions that
researchers in the society of automotive have provided to overcome the CAN-Bus
limitation on different layers.
| cs.CR | nowadays with the help of advanced technology modern vehicles are not only made up of mechanical devices but also consist of highly complex electronic devices and connections to the outside world there are around 70 electronic control units ecus in modern vehicle which are communicating with each other over the standard communication protocol known as controller area network canbus that provides the communication rate up to 1mbps there are different types of invehicle network protocol and bus system namely controlled area network can local interconnected network lin media oriented system transport most and flexray even though canbus is considered as defacto standard for invehicle network communication it inherently lacks the fundamental security features by design like message authentication this security limitation has paved the way for adversaries to penetrate into the vehicle network and do malicious activities which can pose a dangerous situation for both driver and passengers in particular nowadays vehicular networks are not only closed systems but also they are open to different external interfaces namely bluetooth gps to the outside world therefore it creates new opportunities for attackers to remotely take full control of the vehicle the objective of this research is to survey the current limitations of canbus protocol in terms of secure communication and different solutions that researchers in the society of automotive have provided to overcome the canbus limitation on different layers | [['nowadays', 'with', 'the', 'help', 'of', 'advanced', 'technology', 'modern', 'vehicles', 'are', 'not', 'only', 'made', 'up', 'of', 'mechanical', 'devices', 'but', 'also', 'consist', 'of', 'highly', 'complex', 'electronic', 'devices', 'and', 'connections', 'to', 'the', 'outside', 'world', 'there', 'are', 'around', '70', 'electronic', 'control', 'units', 'ecus', 'in', 'modern', 'vehicle', 'which', 'are', 'communicating', 'with', 'each', 'other', 'over', 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1,802.01726 | On embeddings between spaces of functions of generalized bounded
variation | In this note, we aim to establish a number of embeddings between various
function spaces that are frequently considered in the theory of Fourier series.
More specifically, we give sufficient conditions for the embeddings $\Phi
V[h]\subseteq \Lambda\text{BV}^{(p_n\uparrow p)}$, $\Lambda
V[h_1]^{(p)}\subseteq\Gamma V[h_2]^{(q)}$ and $\Lambda\text{BV}^{(p_n\uparrow
p)}\subseteq\Gamma\text{BV}^{(q_n\uparrow q)}$. Our results are new even for
the well-known spaces that have been studied in the literature. In particular,
a number of results due to M. Avdispahi\'{c}, that describe relationships
between the classes $\Lambda\text{BV}$ and $V[h]$, are derived as special
cases.
| math.FA | in this note we aim to establish a number of embeddings between various function spaces that are frequently considered in the theory of fourier series more specifically we give sufficient conditions for the embeddings phi vhsubseteq lambdatextbvp_nuparrow p lambda vh_1psubseteqgamma vh_2q and lambdatextbvp_nuparrow psubseteqgammatextbvq_nuparrow q our results are new even for the wellknown spaces that have been studied in the literature in particular a number of results due to m avdispahic that describe relationships between the classes lambdatextbv and vh are derived as special cases | [['in', 'this', 'note', 'we', 'aim', 'to', 'establish', 'a', 'number', 'of', 'embeddings', 'between', 'various', 'function', 'spaces', 'that', 'are', 'frequently', 'considered', 'in', 'the', 'theory', 'of', 'fourier', 'series', 'more', 'specifically', 'we', 'give', 'sufficient', 'conditions', 'for', 'the', 'embeddings', 'phi', 'vhsubseteq', 'lambdatextbvp_nuparrow', 'p', 'lambda', 'vh_1psubseteqgamma', 'vh_2q', 'and', 'lambdatextbvp_nuparrow', 'psubseteqgammatextbvq_nuparrow', 'q', 'our', 'results', 'are', 'new', 'even', 'for', 'the', 'wellknown', 'spaces', 'that', 'have', 'been', 'studied', 'in', 'the', 'literature', 'in', 'particular', 'a', 'number', 'of', 'results', 'due', 'to', 'm', 'avdispahic', 'that', 'describe', 'relationships', 'between', 'the', 'classes', 'lambdatextbv', 'and', 'vh', 'are', 'derived', 'as', 'special', 'cases']] | [-0.10752233559138734, 0.08046326792327227, -0.06182765094079561, 0.1301850442299861, -0.04006300953990937, -0.09228575962607737, -0.007724302580471259, 0.40161035768687725, -0.2594919491184319, -0.3033769453600557, 0.08581318213398774, -0.24812364293105127, -0.1902275217043889, 0.2524667163772581, -0.07539391405154745, 0.026696907005623563, 0.04030446869369548, 0.06755700874347965, -0.08196666168484401, -0.28391449897876614, 0.3667280454636104, -0.04238885332673014, 0.22977617916397072, 0.04126590271419906, 0.026123970353903323, -0.007516833512088308, -0.031311903097485376, 0.0354315824914176, -0.20792512063308569, 0.13705804517157014, 0.28643482420351596, 0.12342731384016187, 0.2703675941939091, -0.39222366149936405, -0.18870494532241644, 0.17364797259789783, 0.10640280354804323, 0.05358818819286761, -0.04901134602928855, -0.22056193621950104, 0.14948833689649965, -0.12813554895291854, -0.06965065846679272, -0.11798779003007652, 0.08944018654428519, 0.07362947062371517, -0.289752355389684, 0.009885057435044415, 0.09581176606430249, 0.04675102347580643, -0.05000899552349485, -0.14508875262282497, 0.012135802509638105, 0.1430424672684499, 0.07025794599011734, 0.022959954114388916, 0.002374148504300551, -0.12753158746976648, -0.08844830709140651, 0.36506704018487557, -0.04537295285225302, -0.24075393852862445, 0.2201452467850615, -0.1613723984979964, -0.19505198686927944, 0.05582924974725473, 0.17313762926557041, 0.12902729128572074, -0.11730224916155076, 0.1111177687046372, -0.1073425953751188, 0.09378593200938655, 0.09315547349790183, 0.07353580248989648, 0.10944545934847616, 0.08521237896525531, 0.04464251964350001, 0.16723694481778067, -0.04900917549944156, -0.0444843100259903, -0.34735660295322685, -0.15580642532992672, -0.14194572914403852, -0.011746042837425098, -0.0664129801296369, -0.12106942832046612, 0.3423899587534078, 0.12614812968032701, 0.24680353015322576, 0.07866389621291067, 0.21304048182950777, 0.08642440600329768, 0.01634475567632101, 0.04429199588303635, 0.21030336802268956, 0.1604284857393714, 0.07796382458953115, -0.1327419336854976, 0.027783823084666745, 0.09057995372500222] |
1,802.01727 | Ascent sliceness | We introduce the notion of ascent sliceness of virtual knots. A
representative of a virtual knot is an embedding $ S^1 \hookrightarrow
\Sigma_{g} \times I $, for $ \Sigma_g $ a closed connected oriented surface of
genus $ g $; the virtual knot represented is slice if there exists a pair
consisting of a disc $ D $ and an oriented $ 3 $-manifold $ M $, such that $ D
\hookrightarrow M \times I $, $ \partial M = \Sigma_{g} $, and $ \partial D =
S^1 $ (the image of the embedding).
This definition of sliceness exemplifies that a cobordism of virtual links is
a pair consisting of a surface and a $ 3 $-manifold; in addition to analysing
the surfaces, as is done in classical knot theory, we may analyse the $ 3
$-manifolds appearing in cobordisms between virtual knots. In particular,
consider a Morse function on the $ 3 $-manifold $ M $: away from critical
points the level sets are surfaces, and we may ask how the genus of these
surfaces changes as we move through the cobordism. Roughly, a slice virtual
knot $ K $ with genus-minimal representative $ S^1 \hookrightarrow \Sigma_{g}
\times I $ is ascent slice if, given any disc and $ 3 $-manifold pair $ ( D, M
) $ as above, and any Morse function $ f : M \rightarrow I $, the surface $
\Sigma_{g+1} $ appears as a level set of $ f $.
We use an augmented version of doubled Khovanov homology to define a property
which implies ascent sliceness for slice virtual knots of minimal supporting
genus $ 1 $.
| math.GT | we introduce the notion of ascent sliceness of virtual knots a representative of a virtual knot is an embedding s1 hookrightarrow sigma_g times i for sigma_g a closed connected oriented surface of genus g the virtual knot represented is slice if there exists a pair consisting of a disc d and an oriented 3 manifold m such that d hookrightarrow m times i partial m sigma_g and partial d s1 the image of the embedding this definition of sliceness exemplifies that a cobordism of virtual links is a pair consisting of a surface and a 3 manifold in addition to analysing the surfaces as is done in classical knot theory we may analyse the 3 manifolds appearing in cobordisms between virtual knots in particular consider a morse function on the 3 manifold m away from critical points the level sets are surfaces and we may ask how the genus of these surfaces changes as we move through the cobordism roughly a slice virtual knot k with genusminimal representative s1 hookrightarrow sigma_g times i is ascent slice if given any disc and 3 manifold pair d m as above and any morse function f m rightarrow i the surface sigma_g1 appears as a level set of f we use an augmented version of doubled khovanov homology to define a property which implies ascent sliceness for slice virtual knots of minimal supporting genus 1 | [['we', 'introduce', 'the', 'notion', 'of', 'ascent', 'sliceness', 'of', 'virtual', 'knots', 'a', 'representative', 'of', 'a', 'virtual', 'knot', 'is', 'an', 'embedding', 's1', 'hookrightarrow', 'sigma_g', 'times', 'i', 'for', 'sigma_g', 'a', 'closed', 'connected', 'oriented', 'surface', 'of', 'genus', 'g', 'the', 'virtual', 'knot', 'represented', 'is', 'slice', 'if', 'there', 'exists', 'a', 'pair', 'consisting', 'of', 'a', 'disc', 'd', 'and', 'an', 'oriented', '3', 'manifold', 'm', 'such', 'that', 'd', 'hookrightarrow', 'm', 'times', 'i', 'partial', 'm', 'sigma_g', 'and', 'partial', 'd', 's1', 'the', 'image', 'of', 'the', 'embedding', 'this', 'definition', 'of', 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1,802.01728 | Abstract Lorentz spaces and K\"othe duality | Given a fully symmetric Banach function space $E$ and a decreasing positive
weight $w$ on $I = (0, a)$, $0 < a \le \infty $, the generalized Lorentz space
${\Lambda}_{E,w}$ is defined as the symmetrization of the canonical copy $E_w$
of $E$ on the measure space associated with the weight. If $E$ is an Orlicz
space then ${\Lambda}_{E,w}$ is an Orlicz-Lorentz space. An investigation of
the K\"othe duality of these classes is developed that is parallel to
preceding works on Orlicz-Lorentz spaces. First a class of functions $M_{E,w}$,
which does not need to be even a linear space, is similarly defined as the
symmetrization of the space $w.E_w$. Let also $Q_{E,w}$ be the smallest fully
symmetric Banach function space containing $M_{E,w}$. Then the K\"othe dual of
the class $M_{E,w}$ is identified as the Lorentz space ${\Lambda}_{E',w}$,
while the K\"othe dual of ${\Lambda}_{E,w}$ is $Q_{E',w}$. The space $Q_{E,w}$
is also characterized in terms of Halperin's level functions. These results are
applied to concrete Banach function spaces. In particular the K\"othe duality
of Orlicz-Lorentz spaces is revisited at the light of the new results.
| math.FA | given a fully symmetric banach function space e and a decreasing positive weight w on i 0 a 0 a le infty the generalized lorentz space lambda_ew is defined as the symmetrization of the canonical copy e_w of e on the measure space associated with the weight if e is an orlicz space then lambda_ew is an orliczlorentz space an investigation of the kothe duality of these classes is developed that is parallel to preceding works on orliczlorentz spaces first a class of functions m_ew which does not need to be even a linear space is similarly defined as the symmetrization of the space we_w let also q_ew be the smallest fully symmetric banach function space containing m_ew then the kothe dual of the class m_ew is identified as the lorentz space lambda_ew while the kothe dual of lambda_ew is q_ew the space q_ew is also characterized in terms of halperins level functions these results are applied to concrete banach function spaces in particular the kothe duality of orliczlorentz spaces is revisited at the light of the new results | [['given', 'a', 'fully', 'symmetric', 'banach', 'function', 'space', 'e', 'and', 'a', 'decreasing', 'positive', 'weight', 'w', 'on', 'i', '0', 'a', '0', 'a', 'le', 'infty', 'the', 'generalized', 'lorentz', 'space', 'lambda_ew', 'is', 'defined', 'as', 'the', 'symmetrization', 'of', 'the', 'canonical', 'copy', 'e_w', 'of', 'e', 'on', 'the', 'measure', 'space', 'associated', 'with', 'the', 'weight', 'if', 'e', 'is', 'an', 'orlicz', 'space', 'then', 'lambda_ew', 'is', 'an', 'orliczlorentz', 'space', 'an', 'investigation', 'of', 'the', 'kothe', 'duality', 'of', 'these', 'classes', 'is', 'developed', 'that', 'is', 'parallel', 'to', 'preceding', 'works', 'on', 'orliczlorentz', 'spaces', 'first', 'a', 'class', 'of', 'functions', 'm_ew', 'which', 'does', 'not', 'need', 'to', 'be', 'even', 'a', 'linear', 'space', 'is', 'similarly', 'defined', 'as', 'the', 'symmetrization', 'of', 'the', 'space', 'we_w', 'let', 'also', 'q_ew', 'be', 'the', 'smallest', 'fully', 'symmetric', 'banach', 'function', 'space', 'containing', 'm_ew', 'then', 'the', 'kothe', 'dual', 'of', 'the', 'class', 'm_ew', 'is', 'identified', 'as', 'the', 'lorentz', 'space', 'lambda_ew', 'while', 'the', 'kothe', 'dual', 'of', 'lambda_ew', 'is', 'q_ew', 'the', 'space', 'q_ew', 'is', 'also', 'characterized', 'in', 'terms', 'of', 'halperins', 'level', 'functions', 'these', 'results', 'are', 'applied', 'to', 'concrete', 'banach', 'function', 'spaces', 'in', 'particular', 'the', 'kothe', 'duality', 'of', 'orliczlorentz', 'spaces', 'is', 'revisited', 'at', 'the', 'light', 'of', 'the', 'new', 'results']] | [-0.1168454661363673, 0.17401812325996605, -0.06604517816194448, 0.09522613561895331, -0.08998170607916885, -0.07396149215696568, -0.01601496940149057, 0.3535448679219136, -0.30770111739049466, -0.1691026907163055, 0.10699020202004801, -0.24216459557058267, -0.1201382777287384, 0.17738936444367753, -0.09630427979916502, 0.011585248953380277, -0.011172121375003893, 0.06949197619975533, -0.1476710949634631, -0.2569441417012406, 0.4016538094310613, 0.019745623851796675, 0.21427298265017486, 0.013724247553500902, 0.12395602113075471, 0.029543664735377135, 0.003781900094989478, 0.012591126303939316, -0.15017151269752543, 0.09849586870175984, 0.23364113267835523, 0.127726543815074, 0.2832750395735663, -0.29305413204213876, -0.15966721690191857, 0.20050734395339165, 0.1032860167605771, -0.06385163738316427, 0.002725602934016647, -0.2964073555230744, 0.07098794335215235, -0.13586862311892087, -0.11956448682971048, -0.08849861692202937, 0.06410077621825458, 0.014407476975014852, -0.31117513311995465, -0.004156592977298633, 0.07468177031940164, 0.012796554570557193, -0.1021056389096036, -0.10848640801719903, -0.0860752345120346, 0.04191382265691593, -0.015963019429067714, 0.16770659657368525, 0.0682706906266636, -0.05782816323629591, -0.11120303242017379, 0.35405149987867374, -0.049789501657562976, -0.25285188910771117, 0.12993830644585758, -0.18148468798445014, -0.1349065073653323, 0.092615070805121, 0.11521111413499005, 0.16487405048892573, -0.059007772699710026, 0.21938339556440492, -0.12440887930508039, 0.10568307960808822, 0.049813405121415015, 0.06204525311215875, 0.11541155320879992, 0.11462485679723532, 0.11360408275177587, 0.12931983704610697, -0.016813399847348358, -0.05110693086570474, -0.39384144326420817, -0.2083365193704206, -0.21490980418506236, 0.08140639035860822, -0.09115140197078862, -0.16419865272865955, 0.3276975660877867, -0.012016932835823365, 0.20865976288810037, 0.07618414250194629, 0.18408849239977224, 0.13084379978689856, 0.06357040246386143, 0.048486833662066735, 0.17317202019902847, 0.15157907678918348, 0.03904159130722159, -0.1433546562427969, 0.008407512571455994, 0.17559162850146381] |
1,802.01729 | Multiplex Influence Maximization in Online Social Networks with
Heterogeneous Diffusion Models | Motivated by online social networks that are linked together through
overlapping users, we study the influence maximization problem on a multiplex,
with each layer endowed with its own model of influence diffusion. This problem
is a novel version of the influence maximization problem that necessitates new
analysis incorporating the type of propagation on each layer of the multiplex.
We identify a new property, generalized deterministic submodular, which when
satisfied by the propagation in each layer, ensures that the propagation on the
multiplex overall is submodular -- for this case, we formulate ISF, the greedy
algorithm with approximation ratio $(1 - 1/e)$. Since the size of a multiplex
comprising multiple OSNs may encompass billions of users, we formulate an
algorithm KSN that runs on each layer of the multiplex in parallel. KSN takes
an $\alpha$-approximation algorithm A for the influence maximization problem on
a single-layer network as input, and has approximation ratio
$\frac{(1-\epsilon)\alpha}{(o+1)k}$ for arbitrary $\epsilon > 0$, $o$ is the
number of overlapping users, and $k$ is the number of layers in the multiplex.
Experiments on real and synthesized multiplexes validate the efficacy of the
proposed algorithms for the problem of influence maximization in the
heterogeneous multiplex. Implementations of ISF and KSN are available at
http://www.alankuhnle.com/papers/mim/mim.html.
| cs.SI physics.soc-ph | motivated by online social networks that are linked together through overlapping users we study the influence maximization problem on a multiplex with each layer endowed with its own model of influence diffusion this problem is a novel version of the influence maximization problem that necessitates new analysis incorporating the type of propagation on each layer of the multiplex we identify a new property generalized deterministic submodular which when satisfied by the propagation in each layer ensures that the propagation on the multiplex overall is submodular for this case we formulate isf the greedy algorithm with approximation ratio 1 1e since the size of a multiplex comprising multiple osns may encompass billions of users we formulate an algorithm ksn that runs on each layer of the multiplex in parallel ksn takes an alphaapproximation algorithm a for the influence maximization problem on a singlelayer network as input and has approximation ratio frac1epsilonalphao1k for arbitrary epsilon 0 o is the number of overlapping users and k is the number of layers in the multiplex experiments on real and synthesized multiplexes validate the efficacy of the proposed algorithms for the problem of influence maximization in the heterogeneous multiplex implementations of isf and ksn are available at httpwwwalankuhnlecompapersmimmimhtml | [['motivated', 'by', 'online', 'social', 'networks', 'that', 'are', 'linked', 'together', 'through', 'overlapping', 'users', 'we', 'study', 'the', 'influence', 'maximization', 'problem', 'on', 'a', 'multiplex', 'with', 'each', 'layer', 'endowed', 'with', 'its', 'own', 'model', 'of', 'influence', 'diffusion', 'this', 'problem', 'is', 'a', 'novel', 'version', 'of', 'the', 'influence', 'maximization', 'problem', 'that', 'necessitates', 'new', 'analysis', 'incorporating', 'the', 'type', 'of', 'propagation', 'on', 'each', 'layer', 'of', 'the', 'multiplex', 'we', 'identify', 'a', 'new', 'property', 'generalized', 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1,802.0173 | Local Wealth Redistribution Promotes Cooperation in Multiagent Systems | Designing mechanisms that leverage cooperation between agents has been a
long-lasting goal in Multiagent Systems. The task is especially challenging
when agents are selfish, lack common goals and face social dilemmas, i.e.,
situations in which individual interest conflicts with social welfare. Past
works explored mechanisms that explain cooperation in biological and social
systems, providing important clues for the aim of designing cooperative
artificial societies. In particular, several works show that cooperation is
able to emerge when specific network structures underlie agents' interactions.
Notwithstanding, social dilemmas in which defection is highly tempting still
pose challenges concerning the effective sustainability of cooperation. Here we
propose a new redistribution mechanism that can be applied in structured
populations of agents. Importantly, we show that, when implemented locally
(i.e., agents share a fraction of their wealth surplus with their nearest
neighbors), redistribution excels in promoting cooperation under regimes where,
before, only defection prevailed.
| cs.MA cs.AI cs.GT | designing mechanisms that leverage cooperation between agents has been a longlasting goal in multiagent systems the task is especially challenging when agents are selfish lack common goals and face social dilemmas ie situations in which individual interest conflicts with social welfare past works explored mechanisms that explain cooperation in biological and social systems providing important clues for the aim of designing cooperative artificial societies in particular several works show that cooperation is able to emerge when specific network structures underlie agents interactions notwithstanding social dilemmas in which defection is highly tempting still pose challenges concerning the effective sustainability of cooperation here we propose a new redistribution mechanism that can be applied in structured populations of agents importantly we show that when implemented locally ie agents share a fraction of their wealth surplus with their nearest neighbors redistribution excels in promoting cooperation under regimes where before only defection prevailed | [['designing', 'mechanisms', 'that', 'leverage', 'cooperation', 'between', 'agents', 'has', 'been', 'a', 'longlasting', 'goal', 'in', 'multiagent', 'systems', 'the', 'task', 'is', 'especially', 'challenging', 'when', 'agents', 'are', 'selfish', 'lack', 'common', 'goals', 'and', 'face', 'social', 'dilemmas', 'ie', 'situations', 'in', 'which', 'individual', 'interest', 'conflicts', 'with', 'social', 'welfare', 'past', 'works', 'explored', 'mechanisms', 'that', 'explain', 'cooperation', 'in', 'biological', 'and', 'social', 'systems', 'providing', 'important', 'clues', 'for', 'the', 'aim', 'of', 'designing', 'cooperative', 'artificial', 'societies', 'in', 'particular', 'several', 'works', 'show', 'that', 'cooperation', 'is', 'able', 'to', 'emerge', 'when', 'specific', 'network', 'structures', 'underlie', 'agents', 'interactions', 'notwithstanding', 'social', 'dilemmas', 'in', 'which', 'defection', 'is', 'highly', 'tempting', 'still', 'pose', 'challenges', 'concerning', 'the', 'effective', 'sustainability', 'of', 'cooperation', 'here', 'we', 'propose', 'a', 'new', 'redistribution', 'mechanism', 'that', 'can', 'be', 'applied', 'in', 'structured', 'populations', 'of', 'agents', 'importantly', 'we', 'show', 'that', 'when', 'implemented', 'locally', 'ie', 'agents', 'share', 'a', 'fraction', 'of', 'their', 'wealth', 'surplus', 'with', 'their', 'nearest', 'neighbors', 'redistribution', 'excels', 'in', 'promoting', 'cooperation', 'under', 'regimes', 'where', 'before', 'only', 'defection', 'prevailed']] | [-0.16742827174429958, 0.09688781318254769, -0.04097800920961261, 0.11758117008296698, -0.13370077158292956, -0.21555578444669074, 0.09757380229908645, 0.4700653047326046, -0.2794377050280722, -0.2902426994531541, 0.04170623282521233, -0.22766512689004476, -0.2764021186346843, 0.0639683226960384, -0.14041918243841595, -0.05672509675669308, 0.08743322854924544, 0.006618778981155137, 0.12227350074465142, -0.32300147920771427, 0.33946236438193433, 0.058828227364338584, 0.3266209478936838, 0.06577060203739707, 0.09065636907581466, -0.009537115641963995, 0.019969561796421436, 0.02805841326433536, -0.08300651698747871, 0.12068475365231279, 0.41919434951567974, 0.19874478785818242, 0.4558365699281362, -0.48670346801156633, -0.2384011969422588, 0.1513937805068201, 0.17547099998124838, 0.09327114464217998, -0.06344607672528238, -0.27256408282178074, 0.03619536835105611, -0.20304049041776642, -0.09221602026770376, -0.09062662594275221, 0.006835105795805764, 0.03853810110288307, -0.2621045860059157, 0.0307098529873828, 0.040604115179047696, 0.09070069673848716, -0.07818650844588725, -0.09624467639101518, -0.01919019763748086, 0.23616379876192375, 0.07418352828795291, -0.06523825068693809, 0.1621718189861575, -0.2345126053456821, -0.1843134400032058, 0.4362600723004623, 0.06765694115499689, -0.15470808613699283, 0.26486825852063356, -0.09127712037691192, -0.17246325311527863, 0.07331330003216863, 0.21558288475372703, 0.07757265625735493, -0.1683270782577401, -0.003045865662578443, -0.04509834776714293, 0.1714127165944995, 0.030461087882694964, 0.06307252797587598, 0.22174260185518604, 0.2273873354157282, 0.1535822389477461, 0.02733984632603195, 0.0449549263859218, -0.21009883087606648, -0.13211661932763416, -0.06337939199324497, -0.13372598220499837, 0.04740010770950215, -0.07745305730664719, -0.03919809641996147, 0.3161008020145567, 0.17163706704908493, 0.1449606042776911, 0.038516920391860346, 0.2752140783169936, -0.009197565468934339, 0.05019303286334852, 0.08266615863091853, 0.23363396125323316, -0.00020504964993813555, 0.14523916042998206, -0.21392029401141446, 0.23004121362464502, -0.05962809474786391] |
1,802.01731 | On-Orbit Performance of the Helioseismic and Magnetic Imager Instrument
onboard the Solar Dynamics Observatory | The Helioseismic and Magnetic Imager (HMI) instrument is a major component of
NASA's Solar Dynamics Observatory (SDO) spacecraft. Since beginning normal
science operations on 1 May 2010, HMI has operated with remarkable continuity,
e.g. during the more than five years of the SDO prime mission that ended 30
September 2015, HMI collected 98.4% of all possible 45-second velocity maps;
minimizing gaps in these full-disk Dopplergrams is crucial for helioseismology.
HMI velocity, intensity, and magnetic-field measurements are used in numerous
investigations, so understanding the quality of the data is important. We
describe the calibration measurements used to track HMI performance and detail
trends in important instrument parameters during the mission. Regular
calibration sequences provide information used to improve and update the HMI
data calibration. The set-point temperature of the instrument front window and
optical bench is adjusted regularly to maintain instrument focus, and changes
in the temperature-control scheme have been made to improve stability in the
observable quantities. The exposure time has been changed to compensate for a
15% decrease in instrument throughput. Measurements of the performance of the
shutter and tuning mechanisms show that they are aging as expected and continue
to perform according to specification. Parameters of the tunable-optical-filter
elements are regularly adjusted to account for drifts in the central
wavelength. Frequent measurements of changing CCD-camera characteristics, such
as gain and flat field, are used to calibrate the observations. Infrequent
expected events, such as eclipses, transits, and spacecraft off-points,
interrupt regular instrument operations and provide the opportunity to perform
additional calibration. Onboard instrument anomalies are rare and seem to occur
quite uniformly in time. The instrument continues to perform very well.
| astro-ph.SR astro-ph.IM | the helioseismic and magnetic imager hmi instrument is a major component of nasas solar dynamics observatory sdo spacecraft since beginning normal science operations on 1 may 2010 hmi has operated with remarkable continuity eg during the more than five years of the sdo prime mission that ended 30 september 2015 hmi collected 984 of all possible 45second velocity maps minimizing gaps in these fulldisk dopplergrams is crucial for helioseismology hmi velocity intensity and magneticfield measurements are used in numerous investigations so understanding the quality of the data is important we describe the calibration measurements used to track hmi performance and detail trends in important instrument parameters during the mission regular calibration sequences provide information used to improve and update the hmi data calibration the setpoint temperature of the instrument front window and optical bench is adjusted regularly to maintain instrument focus and changes in the temperaturecontrol scheme have been made to improve stability in the observable quantities the exposure time has been changed to compensate for a 15 decrease in instrument throughput measurements of the performance of the shutter and tuning mechanisms show that they are aging as expected and continue to perform according to specification parameters of the tunableopticalfilter elements are regularly adjusted to account for drifts in the central wavelength frequent measurements of changing ccdcamera characteristics such as gain and flat field are used to calibrate the observations infrequent expected events such as eclipses transits and spacecraft offpoints interrupt regular instrument operations and provide the opportunity to perform additional calibration onboard instrument anomalies are rare and seem to occur quite uniformly in time the instrument continues to perform very well | [['the', 'helioseismic', 'and', 'magnetic', 'imager', 'hmi', 'instrument', 'is', 'a', 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1,802.01732 | Status of the semileptonic $B$ decays and muon g-2 in general 2HDMs with
right-handed neutrinos | In this paper, we study the extended Standard Model (SM) with an extra Higgs
doublet and right-handed neutrinos. If the symmetry to distinguish the two
Higgs doublets is not assigned, flavor changing neutral currents (FCNCs)
involving the scalars are predicted even at the tree level. We investigate the
constraints on the FCNCs at the one-loop level, and especially study the
semileptonic $B$ meson decays, e.g. $B \to D^{(*)} \tau \nu$ and $B \to K^{(*)}
ll$ processes, where the SM predictions are more than $2 \sigma$ away from the
experimental results. We also consider the flavor-violating couplings involving
right-handed neutrinos and discuss if the parameters to explain the excesses of
the semileptonic $B$ decays can resolve the discrepancy in the the anomalous
muon magnetic moment. Based on the analysis, we propose the smoking-gun signals
of our model at the LHC.
| hep-ph hep-ex | in this paper we study the extended standard model sm with an extra higgs doublet and righthanded neutrinos if the symmetry to distinguish the two higgs doublets is not assigned flavor changing neutral currents fcncs involving the scalars are predicted even at the tree level we investigate the constraints on the fcncs at the oneloop level and especially study the semileptonic b meson decays eg b to d tau nu and b to k ll processes where the sm predictions are more than 2 sigma away from the experimental results we also consider the flavorviolating couplings involving righthanded neutrinos and discuss if the parameters to explain the excesses of the semileptonic b decays can resolve the discrepancy in the the anomalous muon magnetic moment based on the analysis we propose the smokinggun signals of our model at the lhc | [['in', 'this', 'paper', 'we', 'study', 'the', 'extended', 'standard', 'model', 'sm', 'with', 'an', 'extra', 'higgs', 'doublet', 'and', 'righthanded', 'neutrinos', 'if', 'the', 'symmetry', 'to', 'distinguish', 'the', 'two', 'higgs', 'doublets', 'is', 'not', 'assigned', 'flavor', 'changing', 'neutral', 'currents', 'fcncs', 'involving', 'the', 'scalars', 'are', 'predicted', 'even', 'at', 'the', 'tree', 'level', 'we', 'investigate', 'the', 'constraints', 'on', 'the', 'fcncs', 'at', 'the', 'oneloop', 'level', 'and', 'especially', 'study', 'the', 'semileptonic', 'b', 'meson', 'decays', 'eg', 'b', 'to', 'd', 'tau', 'nu', 'and', 'b', 'to', 'k', 'll', 'processes', 'where', 'the', 'sm', 'predictions', 'are', 'more', 'than', '2', 'sigma', 'away', 'from', 'the', 'experimental', 'results', 'we', 'also', 'consider', 'the', 'flavorviolating', 'couplings', 'involving', 'righthanded', 'neutrinos', 'and', 'discuss', 'if', 'the', 'parameters', 'to', 'explain', 'the', 'excesses', 'of', 'the', 'semileptonic', 'b', 'decays', 'can', 'resolve', 'the', 'discrepancy', 'in', 'the', 'the', 'anomalous', 'muon', 'magnetic', 'moment', 'based', 'on', 'the', 'analysis', 'we', 'propose', 'the', 'smokinggun', 'signals', 'of', 'our', 'model', 'at', 'the', 'lhc']] | [-0.0874145206980233, 0.2758388171826109, 0.03098969516619075, 0.18035747781529915, -0.07466229898084571, -0.2215270152208295, 0.07288737534737992, 0.29399906171204376, -0.2422760067199417, -0.2623735020781378, 0.0027494645399450185, -0.3299185550376344, -0.023136578577322712, 0.07056861731270664, 0.07672835010767197, -0.007639575810774678, 0.04251942225805611, 0.03526658038173219, -0.06320483170670839, -0.22529025152057625, 0.2955910995160397, 0.0011032430267484067, 0.16734263656674314, 0.09995897753304876, 0.0019022936919342271, -0.03223286690056431, -0.0508340962512566, -0.08932803929682902, -0.11995106472687381, 0.07226398337980826, 0.12631307245171863, 0.07568952183259263, 0.08779269478303924, -0.38774986412349366, -0.1179176069655382, 0.18691667665144523, 0.14717664395611008, 0.08314010886837253, -0.023274480653009647, -0.3426843800803097, 0.13760201813378406, -0.1390079861145011, -0.07673766432860163, -0.06846421656848715, -0.04574825741156346, -0.13856259692232492, -0.38228877678366124, 0.06771885985722129, -0.024693064892450146, 0.03858558351438653, 0.0022350824773043607, -0.23322586014384417, -0.04102734631269152, 0.02209990873946239, 0.20200689414284936, 0.02118943308575561, 0.15498352598938286, -0.1965068591098643, -0.18782795731668367, 0.41572084269828075, -0.13931582899809825, -0.19440874877794506, 0.1880617918741467, -0.24581671216551937, -0.1786004926876597, 0.09487211020167569, 0.2059747995339709, 0.051352906461282495, -0.17611341370711867, 0.18066599511327022, -0.0656288233016142, 0.13818296639369332, 0.03874221065570768, 0.021254579181508193, 0.2524850758080699, 0.15626276836047123, 0.025462768693863273, 0.03446585646321287, -0.11755898675258211, -0.0028993780389696146, -0.41616152448155885, -0.14158271223377009, -0.052825406300935816, 0.06190925493441512, -0.028976301035739938, -0.06477543499251441, 0.4395213903517549, 0.149477773145002, 0.2671495541032377, 0.018742118995609902, 0.2948327566724833, 0.09958351680610275, 0.07188091844675405, 0.05576827754970077, 0.29034155661494826, 0.14951558013801738, 0.10254562593889323, -0.2887956547507306, 0.014709601232366596, 0.062210059912352685] |
1,802.01733 | Internet - assisted risk assessment of infectious diseases in women
sexual and reproductive health | We develop open source infection risk calculators for patients and healthcare
professionals as apps for hospital acquired infections (during child-delivery)
and sexually transmitted infections (like HIV). Advanced versions of ehealth in
non-communicable diseases do not apply to epidemiology much. There is, however,
no infection risk calculator in the Polish Internet so far, despite the
existence of data that may be applied to create such a tool.
The algorithms involve data from Information Systems (like HIS in hospitals)
and surveys by applying mathematical modelling, Bayesian inference, logistic
regressions, covariance analysis and social network analysis. Finally, user may
fill or import data from Information System to obtain risk assessment and test
different settings to learn overall risk.
The most promising risk calculator is developed for Healthcare-associated
infections in modes for patient hospital sanitary inspection. The most extended
version for hospital epidemiologists may include many layers of hospital
interactions by agent-based modeling. Simplified version of calculator is
dedicated to patients that require personalized hospitalization history of
pregnancy described by questions represented by quantitative and qualitative
variables. Patients receive risk assessment from interactive web application
with additional description about modifiable risk factors.
We also provide solution for sexually transmitted infections like HIV. The
results of calculations with meaningful description and percentage chances are
presented in real-time to interested users. Finally, user fills the form to
obtain risk assessment for given settings.
| stat.AP physics.soc-ph q-bio.PE | we develop open source infection risk calculators for patients and healthcare professionals as apps for hospital acquired infections during childdelivery and sexually transmitted infections like hiv advanced versions of ehealth in noncommunicable diseases do not apply to epidemiology much there is however no infection risk calculator in the polish internet so far despite the existence of data that may be applied to create such a tool the algorithms involve data from information systems like his in hospitals and surveys by applying mathematical modelling bayesian inference logistic regressions covariance analysis and social network analysis finally user may fill or import data from information system to obtain risk assessment and test different settings to learn overall risk the most promising risk calculator is developed for healthcareassociated infections in modes for patient hospital sanitary inspection the most extended version for hospital epidemiologists may include many layers of hospital interactions by agentbased modeling simplified version of calculator is dedicated to patients that require personalized hospitalization history of pregnancy described by questions represented by quantitative and qualitative variables patients receive risk assessment from interactive web application with additional description about modifiable risk factors we also provide solution for sexually transmitted infections like hiv the results of calculations with meaningful description and percentage chances are presented in realtime to interested users finally user fills the form to obtain risk assessment for given settings | [['we', 'develop', 'open', 'source', 'infection', 'risk', 'calculators', 'for', 'patients', 'and', 'healthcare', 'professionals', 'as', 'apps', 'for', 'hospital', 'acquired', 'infections', 'during', 'childdelivery', 'and', 'sexually', 'transmitted', 'infections', 'like', 'hiv', 'advanced', 'versions', 'of', 'ehealth', 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1,802.01734 | Stochastic parabolic Anderson model with time-homogeneous generalized
potential: Mild formulation of solution | A mild formulation for stochastic parabolic Anderson model with
time-homogeneous Gaussian potential suggests a way of defining a solution to
obtain its optimal regularity. Two different interpretations in the equation or
in the mild formulation are possible with usual pathwise product and the Wick
product: the usual pathwise interpretation is mainly discussed. We emphasize
that a modified version of parabolic Schauder estimates is a key idea for the
existence and uniqueness of a mild solution. In particular, the mild
formulation is crucial to investigate a relation between the equation with
usual pathwise product and the Wick product.
| math.AP | a mild formulation for stochastic parabolic anderson model with timehomogeneous gaussian potential suggests a way of defining a solution to obtain its optimal regularity two different interpretations in the equation or in the mild formulation are possible with usual pathwise product and the wick product the usual pathwise interpretation is mainly discussed we emphasize that a modified version of parabolic schauder estimates is a key idea for the existence and uniqueness of a mild solution in particular the mild formulation is crucial to investigate a relation between the equation with usual pathwise product and the wick product | [['a', 'mild', 'formulation', 'for', 'stochastic', 'parabolic', 'anderson', 'model', 'with', 'timehomogeneous', 'gaussian', 'potential', 'suggests', 'a', 'way', 'of', 'defining', 'a', 'solution', 'to', 'obtain', 'its', 'optimal', 'regularity', 'two', 'different', 'interpretations', 'in', 'the', 'equation', 'or', 'in', 'the', 'mild', 'formulation', 'are', 'possible', 'with', 'usual', 'pathwise', 'product', 'and', 'the', 'wick', 'product', 'the', 'usual', 'pathwise', 'interpretation', 'is', 'mainly', 'discussed', 'we', 'emphasize', 'that', 'a', 'modified', 'version', 'of', 'parabolic', 'schauder', 'estimates', 'is', 'a', 'key', 'idea', 'for', 'the', 'existence', 'and', 'uniqueness', 'of', 'a', 'mild', 'solution', 'in', 'particular', 'the', 'mild', 'formulation', 'is', 'crucial', 'to', 'investigate', 'a', 'relation', 'between', 'the', 'equation', 'with', 'usual', 'pathwise', 'product', 'and', 'the', 'wick', 'product']] | [-0.11961620746506858, 0.022014290687253642, -0.13236443148253813, 0.11240638554283447, -0.11451969420556556, -0.1602270008957724, 0.02889404472290087, 0.327175823491566, -0.32625986015443337, -0.20336249591686675, 0.14576755958182028, -0.21814386411233969, -0.1658840464912931, 0.14848045652885875, -0.12961370700528635, 0.06033232357753825, 0.08522551498116598, 0.025658927022565885, -0.1345728971574158, -0.17818804715097564, 0.3797334508535923, -0.00834905881357869, 0.2752494048735261, 0.01897355042801229, 0.14640179803575745, 0.015260501289452166, -0.04904730488382971, -0.014570880028390392, -0.17413859918376626, 0.11115090913840175, 0.15937177053431875, 0.08169516950087219, 0.32782261889696734, -0.40249505491216775, -0.18166333050035016, 0.12334950982602601, 0.08073786757952418, 0.06840803736542381, -0.061153348588106254, -0.2774666246103564, 0.06184543479118765, -0.15226647949095853, -0.22760793497574697, -0.08028693795780238, -0.01023394057584792, 0.045683213634435664, -0.32347410722916525, 0.12192644093896157, 0.11245172156846707, -0.013622558666105122, -0.11883795550021045, -0.08396831103456542, -0.022799907329002608, 0.00908285913960144, 0.09373554347092573, 0.015922204509723124, 0.04240838216963349, -0.09774354215202488, -0.0995757813306199, 0.35005619976976793, -0.12967317311342844, -0.28288514138266596, 0.17592752392682218, -0.1450029817102573, -0.13568121476636566, 0.06686555932170336, 0.06661830022547048, 0.12245192394121406, -0.20619346241265074, 0.12971031365102426, -0.08508296573976266, 0.0809622132483409, 0.06688995062632813, 0.03785137109669674, 0.10029960416987077, 0.1571978691307655, 0.13366158327721445, 0.13199600537029124, 0.019089174048840692, -0.16807702590396972, -0.38757812208736064, -0.20780733818927608, -0.08847277771115072, 0.12198191889820947, -0.1680673055931957, -0.2218801345503361, 0.3441474115015152, 0.12452125105257962, 0.1629150443537564, 0.06003981507047243, 0.2513962902474342, 0.20828048699564233, -0.028743000926699527, 0.03066861934986292, 0.19939068821018813, 0.21950988943410135, 0.09280405989992097, -0.1754927209712872, 0.09300443689943742, 0.17501490538671] |
1,802.01735 | About the Noether's theorem for fractional Lagrangian systems and a
generalization of the classical Jost method of proof | Recently, the fractional Noether's theorem derived by G. Frederico and D.F.M.
Torres in Appl. Math. Comp. 217,3,2010 was proved to be wrong by R.A.C.
Ferreira and A.B. Malinowska in JMAA 429, 2, 2015 using a counterexample and
doubts are stated about the validity of other Noether's type Theorem, in
particular(JMAA 334, 2007,Theorem 32). However, the counterexample does not
explain why and where the proof given in Appl. Math. Comp. 217,3,2010 does not
work. In this paper, we make a detailed analysis of the proof proposed by G.
Frederico and D.F.M. Torres in JMAA 334, 2007 which is based on a fractional
generalization of a method proposed by J. Jost and X.Li-Jost in the classical
case. This method is also used in Appl. Math. Comp. 217,3,2010. We first detail
this method and then its fractional version. Several points leading to
difficulties are put in evidence, in particular the definition of variational
symmetries and some properties of local group of transformations in the
fractional case. These difficulties arise in several generalization of the
Jost's method, in particular in the discrete setting. We then derive a
fractional Noether's Theorem following this strategy, correcting the initial
statement of Frederico and Torres in JMAA 334, 2007 and obtaining an
alternative proof of the main result of Atanackovic and al. in Nonlinear
Analysis 71, 2009.
| math.OC | recently the fractional noethers theorem derived by g frederico and dfm torres in appl math comp 21732010 was proved to be wrong by rac ferreira and ab malinowska in jmaa 429 2 2015 using a counterexample and doubts are stated about the validity of other noethers type theorem in particularjmaa 334 2007theorem 32 however the counterexample does not explain why and where the proof given in appl math comp 21732010 does not work in this paper we make a detailed analysis of the proof proposed by g frederico and dfm torres in jmaa 334 2007 which is based on a fractional generalization of a method proposed by j jost and xlijost in the classical case this method is also used in appl math comp 21732010 we first detail this method and then its fractional version several points leading to difficulties are put in evidence in particular the definition of variational symmetries and some properties of local group of transformations in the fractional case these difficulties arise in several generalization of the josts method in particular in the discrete setting we then derive a fractional noethers theorem following this strategy correcting the initial statement of frederico and torres in jmaa 334 2007 and obtaining an alternative proof of the main result of atanackovic and al in nonlinear analysis 71 2009 | [['recently', 'the', 'fractional', 'noethers', 'theorem', 'derived', 'by', 'g', 'frederico', 'and', 'dfm', 'torres', 'in', 'appl', 'math', 'comp', '21732010', 'was', 'proved', 'to', 'be', 'wrong', 'by', 'rac', 'ferreira', 'and', 'ab', 'malinowska', 'in', 'jmaa', '429', '2', '2015', 'using', 'a', 'counterexample', 'and', 'doubts', 'are', 'stated', 'about', 'the', 'validity', 'of', 'other', 'noethers', 'type', 'theorem', 'in', 'particularjmaa', '334', '2007theorem', '32', 'however', 'the', 'counterexample', 'does', 'not', 'explain', 'why', 'and', 'where', 'the', 'proof', 'given', 'in', 'appl', 'math', 'comp', '21732010', 'does', 'not', 'work', 'in', 'this', 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1,802.01736 | Wavefront Sensing in Space: Flight Demonstration II of the PICTURE
Sounding Rocket Payload | A NASA sounding rocket for high-contrast imaging with a visible nulling
coronagraph, the PICTURE payload, has made two suborbital attempts to observe
the warm dust disk inferred around Epsilon Eridani. The first flight in 2011
demonstrated a 5 milliarcsecond fine pointing system in space. The reduced
flight data from the second launch, on 25 November 2015, presented herein,
demonstrate active sensing of wavefront phase in space. Despite several
anomalies in flight, post-facto reduction phase stepping interferometer data
provides insight into the wavefront sensing precision and the system stability
for a portion of the pupil. These measurements show the actuation of a
32$\times$32-actuator microelectromechanical system deformable mirror. The
wavefront sensor reached a median precision of 1.4 nanometers per pixel, with
95% of samples between 0.8 and 12.0 nanometers per pixel. The median system
stability, including telescope and coronagraph wavefront errors other than tip,
tilt, and piston, was 3.6 nanometers per pixel, with 95% of samples between 1.2
and 23.7 nanometers per pixel.
| astro-ph.IM | a nasa sounding rocket for highcontrast imaging with a visible nulling coronagraph the picture payload has made two suborbital attempts to observe the warm dust disk inferred around epsilon eridani the first flight in 2011 demonstrated a 5 milliarcsecond fine pointing system in space the reduced flight data from the second launch on 25 november 2015 presented herein demonstrate active sensing of wavefront phase in space despite several anomalies in flight postfacto reduction phase stepping interferometer data provides insight into the wavefront sensing precision and the system stability for a portion of the pupil these measurements show the actuation of a 32times32actuator microelectromechanical system deformable mirror the wavefront sensor reached a median precision of 14 nanometers per pixel with 95 of samples between 08 and 120 nanometers per pixel the median system stability including telescope and coronagraph wavefront errors other than tip tilt and piston was 36 nanometers per pixel with 95 of samples between 12 and 237 nanometers per pixel | [['a', 'nasa', 'sounding', 'rocket', 'for', 'highcontrast', 'imaging', 'with', 'a', 'visible', 'nulling', 'coronagraph', 'the', 'picture', 'payload', 'has', 'made', 'two', 'suborbital', 'attempts', 'to', 'observe', 'the', 'warm', 'dust', 'disk', 'inferred', 'around', 'epsilon', 'eridani', 'the', 'first', 'flight', 'in', '2011', 'demonstrated', 'a', '5', 'milliarcsecond', 'fine', 'pointing', 'system', 'in', 'space', 'the', 'reduced', 'flight', 'data', 'from', 'the', 'second', 'launch', 'on', '25', 'november', '2015', 'presented', 'herein', 'demonstrate', 'active', 'sensing', 'of', 'wavefront', 'phase', 'in', 'space', 'despite', 'several', 'anomalies', 'in', 'flight', 'postfacto', 'reduction', 'phase', 'stepping', 'interferometer', 'data', 'provides', 'insight', 'into', 'the', 'wavefront', 'sensing', 'precision', 'and', 'the', 'system', 'stability', 'for', 'a', 'portion', 'of', 'the', 'pupil', 'these', 'measurements', 'show', 'the', 'actuation', 'of', 'a', '32times32actuator', 'microelectromechanical', 'system', 'deformable', 'mirror', 'the', 'wavefront', 'sensor', 'reached', 'a', 'median', 'precision', 'of', '14', 'nanometers', 'per', 'pixel', 'with', '95', 'of', 'samples', 'between', '08', 'and', '120', 'nanometers', 'per', 'pixel', 'the', 'median', 'system', 'stability', 'including', 'telescope', 'and', 'coronagraph', 'wavefront', 'errors', 'other', 'than', 'tip', 'tilt', 'and', 'piston', 'was', '36', 'nanometers', 'per', 'pixel', 'with', '95', 'of', 'samples', 'between', '12', 'and', '237', 'nanometers', 'per', 'pixel']] | [-0.11394907869253075, 0.15492746245290617, -0.0327550814836286, -0.05313487154489849, -0.019086722820065915, -0.14341531029203908, 0.046939363093406426, 0.4211698079190683, -0.20866550685022958, -0.46223701257258654, 0.14543713497550925, -0.29918071061401863, -0.05875342352082953, 0.2171904335526051, -0.1394667134154588, 0.1075353243824793, 0.11673235173802823, -0.06157557745755184, -0.05322892580443295, -0.20851899285116815, 0.15751925919612403, 0.13114278466673568, 0.2249158117658226, -0.051862571581295924, 0.19695009913557443, -0.02869411230494734, -0.04988867022912018, -0.05998524367496429, -0.11509417572524398, 0.05620990262250416, 0.2128562583035091, 0.046231083249585934, 0.25422229192045054, -0.39610816141357647, -0.1873363900696859, 0.009690367725215764, 0.10859962260874453, 0.002461442947969772, -0.05482796678088562, -0.3340051084058359, 0.033559097442775965, -0.14371094829075445, -0.13156011455866973, 0.03393954136408865, 0.02861620105977636, -0.025319705612491816, -0.22483560771215708, 0.022051067929714917, -0.0332626096351305, 0.14102448149060365, -0.09926619752368424, -0.10999834761605598, -0.02146644464955898, 0.10481462281313725, -0.06630431502344436, 0.07174573060765396, 0.19598988649231613, -0.08468491252933745, -0.053275181740173136, 0.3820740215596743, -0.02456874226236323, -0.051520466251531616, 0.11058761608437635, -0.2667993715032935, -0.06186273806670215, 0.22200534318981227, 0.19209752230090088, 0.0931723971007159, -0.11677494007744826, -0.01992056085910008, 0.04507215920948511, 0.2981862776563503, 0.14613689899852034, 0.0475818085433275, 0.2333042550017126, 0.24578062583168503, 0.12089213356375694, 0.1092557178782954, -0.3224500818105298, -0.029735073218762408, -0.2904841834824765, -0.13014371829167432, -0.15209422998595984, -0.02502597883794806, -0.14200298566092898, -0.07240924078032548, 0.3571423383997171, 0.17431725857313723, 0.1615266699634958, 0.022621322478516958, 0.36310454168124123, -0.017118877200846327, 0.11334500540688168, -0.000642829283606261, 0.36789743790286594, 0.11847289394354447, 0.18194173538649921, -0.15618646088132665, -0.013362990524910856, 0.010834298806730657] |
1,802.01737 | Bayesian Coreset Construction via Greedy Iterative Geodesic Ascent | Coherent uncertainty quantification is a key strength of Bayesian methods.
But modern algorithms for approximate Bayesian posterior inference often
sacrifice accurate posterior uncertainty estimation in the pursuit of
scalability. This work shows that previous Bayesian coreset construction
algorithms---which build a small, weighted subset of the data that approximates
the full dataset---are no exception. We demonstrate that these algorithms scale
the coreset log-likelihood suboptimally, resulting in underestimated posterior
uncertainty. To address this shortcoming, we develop greedy iterative geodesic
ascent (GIGA), a novel algorithm for Bayesian coreset construction that scales
the coreset log-likelihood optimally. GIGA provides geometric decay in
posterior approximation error as a function of coreset size, and maintains the
fast running time of its predecessors. The paper concludes with validation of
GIGA on both synthetic and real datasets, demonstrating that it reduces
posterior approximation error by orders of magnitude compared with previous
coreset constructions.
| stat.ML cs.LG stat.CO | coherent uncertainty quantification is a key strength of bayesian methods but modern algorithms for approximate bayesian posterior inference often sacrifice accurate posterior uncertainty estimation in the pursuit of scalability this work shows that previous bayesian coreset construction algorithmswhich build a small weighted subset of the data that approximates the full datasetare no exception we demonstrate that these algorithms scale the coreset loglikelihood suboptimally resulting in underestimated posterior uncertainty to address this shortcoming we develop greedy iterative geodesic ascent giga a novel algorithm for bayesian coreset construction that scales the coreset loglikelihood optimally giga provides geometric decay in posterior approximation error as a function of coreset size and maintains the fast running time of its predecessors the paper concludes with validation of giga on both synthetic and real datasets demonstrating that it reduces posterior approximation error by orders of magnitude compared with previous coreset constructions | [['coherent', 'uncertainty', 'quantification', 'is', 'a', 'key', 'strength', 'of', 'bayesian', 'methods', 'but', 'modern', 'algorithms', 'for', 'approximate', 'bayesian', 'posterior', 'inference', 'often', 'sacrifice', 'accurate', 'posterior', 'uncertainty', 'estimation', 'in', 'the', 'pursuit', 'of', 'scalability', 'this', 'work', 'shows', 'that', 'previous', 'bayesian', 'coreset', 'construction', 'algorithmswhich', 'build', 'a', 'small', 'weighted', 'subset', 'of', 'the', 'data', 'that', 'approximates', 'the', 'full', 'datasetare', 'no', 'exception', 'we', 'demonstrate', 'that', 'these', 'algorithms', 'scale', 'the', 'coreset', 'loglikelihood', 'suboptimally', 'resulting', 'in', 'underestimated', 'posterior', 'uncertainty', 'to', 'address', 'this', 'shortcoming', 'we', 'develop', 'greedy', 'iterative', 'geodesic', 'ascent', 'giga', 'a', 'novel', 'algorithm', 'for', 'bayesian', 'coreset', 'construction', 'that', 'scales', 'the', 'coreset', 'loglikelihood', 'optimally', 'giga', 'provides', 'geometric', 'decay', 'in', 'posterior', 'approximation', 'error', 'as', 'a', 'function', 'of', 'coreset', 'size', 'and', 'maintains', 'the', 'fast', 'running', 'time', 'of', 'its', 'predecessors', 'the', 'paper', 'concludes', 'with', 'validation', 'of', 'giga', 'on', 'both', 'synthetic', 'and', 'real', 'datasets', 'demonstrating', 'that', 'it', 'reduces', 'posterior', 'approximation', 'error', 'by', 'orders', 'of', 'magnitude', 'compared', 'with', 'previous', 'coreset', 'constructions']] | [-0.06532821478322148, -0.026013785825622544, -0.08427849147652447, 0.12179517377869711, -0.1062598350543109, -0.11270773576565979, 0.12653266191138218, 0.41824328364200997, -0.2743942084013891, -0.36440434200610494, 0.08366421699559998, -0.20051536512311915, -0.14010485877860074, 0.19350100359157987, -0.15072836264194003, 0.14762161287739808, 0.16527341996831163, -0.035750028683843325, -0.11977874951004247, -0.3115655635286805, 0.21959517642521156, 0.1152373526432276, 0.32832898133480265, -0.06276407558716912, 0.14473034490312248, -0.00011171767501239205, -0.05696515876858849, -0.006745519493640938, -0.1276650719413174, 0.16542158272686336, 0.2746558545918112, 0.23557842258875533, 0.3633036355973339, -0.35960439366983693, -0.17341317077992077, 0.11822271424109562, 0.18771874416856468, 0.11981902477869676, -0.009118364988596663, -0.24041749156099862, 0.0602776587655453, -0.16144854341253218, -0.04301881192343861, -0.15673521948276534, -0.019470706432861026, -0.006413068228834112, -0.33148327361608687, 0.11708208575228256, 0.054985228192198914, 0.025993947992363656, 0.014369754128085948, -0.20714052164973035, 0.08244793615500692, 0.038161872095808805, 0.052678923238590226, 0.0750383567237164, 0.13626040022903857, -0.07245380286058463, -0.1533399685991036, 0.30744216332054686, -0.052180489512081714, -0.203376118900438, 0.08679134545283733, -0.04518977471325599, -0.17202037765683842, 0.15605485816584558, 0.18389026350735255, 0.13257629343908622, -0.1147785892703531, 0.10640733855576451, -0.03407474350541646, 0.1842135921363312, 0.039869827710249474, -0.004297649108273515, 0.0797229119589631, 0.2501313114935585, 0.14381695644024917, 0.10271162768288082, -0.09633132692387092, -0.13462847183314217, -0.2819638085538443, -0.10252436761148717, -0.23716154919681467, -0.014942655516919536, -0.21807210664834636, -0.23681713546573802, 0.3487462620578811, 0.2501372755455955, 0.20980142184506945, 0.22139074577799092, 0.39561260066611664, 0.05900980443874059, 0.023264299491158043, 0.1382835189464279, 0.20914837545518514, 0.08366380949688315, 0.005880527345883384, -0.17964525343391152, 0.13785688920786054, 0.06629517095156906] |
1,802.01738 | Formal Verification of Spacecraft Control Programs Using a Metalanguage
for State Transformers | Verification of functional correctness of control programs is an essential
task for the development of space electronics; it is difficult and
time-consuming and typically outweighs design and programming tasks in terms of
development hours. We present a verification approach designed to help
spacecraft engineers reduce the effort required for formal verification of
low-level control programs executed on custom hardware. The approach uses a
metalanguage to describe the semantics of a program as a state transformer,
which can be compiled to multiple targets for testing, formal verification, and
code generation. The metalanguage itself is embedded in a strongly-typed host
language (Haskell), providing a way to prove program properties at the type
level, which can shorten the feedback loop and further increase the
productivity of engineers.
The verification approach is demonstrated on an industrial case study. We
present REDFIN, a processing core used in space missions, and its formal
semantics expressed using the proposed metalanguage, followed by a detailed
example of verification of a simple control program.
| cs.PL | verification of functional correctness of control programs is an essential task for the development of space electronics it is difficult and timeconsuming and typically outweighs design and programming tasks in terms of development hours we present a verification approach designed to help spacecraft engineers reduce the effort required for formal verification of lowlevel control programs executed on custom hardware the approach uses a metalanguage to describe the semantics of a program as a state transformer which can be compiled to multiple targets for testing formal verification and code generation the metalanguage itself is embedded in a stronglytyped host language haskell providing a way to prove program properties at the type level which can shorten the feedback loop and further increase the productivity of engineers the verification approach is demonstrated on an industrial case study we present redfin a processing core used in space missions and its formal semantics expressed using the proposed metalanguage followed by a detailed example of verification of a simple control program | [['verification', 'of', 'functional', 'correctness', 'of', 'control', 'programs', 'is', 'an', 'essential', 'task', 'for', 'the', 'development', 'of', 'space', 'electronics', 'it', 'is', 'difficult', 'and', 'timeconsuming', 'and', 'typically', 'outweighs', 'design', 'and', 'programming', 'tasks', 'in', 'terms', 'of', 'development', 'hours', 'we', 'present', 'a', 'verification', 'approach', 'designed', 'to', 'help', 'spacecraft', 'engineers', 'reduce', 'the', 'effort', 'required', 'for', 'formal', 'verification', 'of', 'lowlevel', 'control', 'programs', 'executed', 'on', 'custom', 'hardware', 'the', 'approach', 'uses', 'a', 'metalanguage', 'to', 'describe', 'the', 'semantics', 'of', 'a', 'program', 'as', 'a', 'state', 'transformer', 'which', 'can', 'be', 'compiled', 'to', 'multiple', 'targets', 'for', 'testing', 'formal', 'verification', 'and', 'code', 'generation', 'the', 'metalanguage', 'itself', 'is', 'embedded', 'in', 'a', 'stronglytyped', 'host', 'language', 'haskell', 'providing', 'a', 'way', 'to', 'prove', 'program', 'properties', 'at', 'the', 'type', 'level', 'which', 'can', 'shorten', 'the', 'feedback', 'loop', 'and', 'further', 'increase', 'the', 'productivity', 'of', 'engineers', 'the', 'verification', 'approach', 'is', 'demonstrated', 'on', 'an', 'industrial', 'case', 'study', 'we', 'present', 'redfin', 'a', 'processing', 'core', 'used', 'in', 'space', 'missions', 'and', 'its', 'formal', 'semantics', 'expressed', 'using', 'the', 'proposed', 'metalanguage', 'followed', 'by', 'a', 'detailed', 'example', 'of', 'verification', 'of', 'a', 'simple', 'control', 'program']] | [-0.11995176831401433, -0.03014030308642594, -0.09786663179172937, 0.056865904090756716, -0.1458869934985132, -0.15104907437820325, 0.06325596289314103, 0.3632421174735734, -0.27701505781010244, -0.38720014457675545, 0.14929747229554888, -0.1766685685904866, -0.10935939282327044, 0.2507571270378927, -0.11180260540973959, 0.11468937168370537, 0.09705403811778084, -0.009805567922409286, -0.048469799508651094, -0.22784876037163265, 0.23033215028487825, 0.0758622285825285, 0.26024120910742293, 0.02152082764854034, 0.0930902205950891, 0.02644698556343263, -0.026878761486009217, -0.013021944169392527, -0.05638555700283949, 0.16972837118700035, 0.3566985723830647, 0.2560717486169641, 0.3498725256812053, -0.45566698920094606, -0.14330619557153884, 0.015372530640469808, 0.09002394604242661, 0.06341051928713128, -0.030973644275923796, -0.299885720786441, 0.07219921430488202, -0.2225798843315605, -0.0797046176073226, -0.13317474519100153, 0.0028045691098227644, -0.03542490040368152, -0.24624428616935443, -0.08607213999511618, 0.08372253501420897, 0.12813904576398658, -0.02835781779634117, -0.05280239306051623, -0.016789105991042698, 0.16257674581455914, -0.028505137212800256, 0.03958961520234659, 0.17864347951959422, -0.10534477230076762, -0.17225077350793236, 0.3906856952743097, -0.019790748489851302, -0.17222669130812088, 0.2124561398233654, -0.017007467192315467, -0.17990018104513486, 0.09391143469591484, 0.21014910427232583, 0.11746906407008118, -0.16880376191358223, 0.07354856105591875, 0.06011141911713463, 0.25883492740350916, 0.015688125518235292, -0.008050977980548685, 0.2247011600118695, 0.26160673867120887, 0.033807156751793105, 0.1834723430509312, 0.005895152030456247, -0.04685414872612014, -0.32248844658906545, -0.2257420671200662, -0.12050348096244941, -0.0484474587028451, -0.008756110818428692, -0.1525294299773646, 0.3803115973150301, 0.16726231189359994, 0.07390404690804919, 0.09694075821898877, 0.3594171121885831, 0.10113073592991427, 0.12900917311904556, 0.054253437211666485, 0.1529569737076985, 0.06385179410801467, 0.15803568812482285, -0.20990603374543063, 0.13210574055203433, 0.04904280902930733] |
1,802.01739 | Irreducible factorization of translates of reversed Dickson polynomials
over finite fields | Let $F$ be a field of $q$ elements, where $q$ is a power of an odd prime. Fix
$n = (q+1)/2$. For each $s \in F$, we describe all the irreducible factors over
$F$ of the polynomial $g_s(y): = y^n + (1-y)^n -s$, and we give a necessary and
sufficient condition on $s$ for $g_s(y)$ to be irreducible.
| math.NT | let f be a field of q elements where q is a power of an odd prime fix n q12 for each s in f we describe all the irreducible factors over f of the polynomial g_sy yn 1yn s and we give a necessary and sufficient condition on s for g_sy to be irreducible | [['let', 'f', 'be', 'a', 'field', 'of', 'q', 'elements', 'where', 'q', 'is', 'a', 'power', 'of', 'an', 'odd', 'prime', 'fix', 'n', 'q12', 'for', 'each', 's', 'in', 'f', 'we', 'describe', 'all', 'the', 'irreducible', 'factors', 'over', 'f', 'of', 'the', 'polynomial', 'g_sy', 'yn', '1yn', 's', 'and', 'we', 'give', 'a', 'necessary', 'and', 'sufficient', 'condition', 'on', 's', 'for', 'g_sy', 'to', 'be', 'irreducible']] | [-0.24543170700781047, 0.1566485415099193, -0.0841810641129716, -0.024230843541982513, -0.021535327738652434, -0.20630311293420023, -0.008355229461673074, 0.3087377118734786, -0.2777385527554613, -0.21199752738735136, 0.006693919607921719, -0.23606935043174487, -0.06352510826680093, 0.18036605402504882, -0.03613567013794986, -0.04890533491561655, -0.021027116866137546, 0.18325005822743362, -0.052443153905467346, -0.32256762866074074, 0.3064435695369656, -0.08177987615076396, 0.10134520191842547, 0.05602335600325695, 0.09608245121601683, 0.030534146532702904, 0.04173180744356404, -0.02480134563610101, -0.19633914129092142, 0.0642112525842654, 0.3189063950513418, 0.14093198880660707, 0.23622902382451755, -0.3683654558665764, -0.1031151958830798, 0.2921518479258968, 0.13887072888722357, -0.05841907461245473, 0.050069904731711946, -0.16760495052529642, 0.20439968288589555, -0.16020077868149832, -0.1565514830335115, -0.09324919740454508, 0.1967216477518937, 0.048054116437784754, -0.4495640747750608, -0.039713883468021564, 0.12402304682809, 0.1318211284143707, -0.017368123750202358, -0.1838976965070917, -0.013945193343365995, 0.08745061675122437, -0.0486974754379704, 0.11835768641545795, -0.0023790633735748436, -0.09449151843392219, -0.03435483252486357, 0.3728689064200108, -0.0838124335815127, -0.22541373767531836, 0.03748966358566227, -0.18112593941175595, -0.10581734790824927, 0.13967769781951433, 0.1591598663228349, 0.1392369128924866, -0.01657752407929645, 0.23813722633461182, -0.08040962606453551, 0.13716327542295823, 0.07368389273044439, -0.01625281135336711, 0.1265702469032616, 0.019578495546459004, 0.08171480970878083, 0.11523454288432661, 0.010903415185076972, 0.13449483783020136, -0.431122109419308, -0.18718116680303445, -0.16999990678204296, 0.1778183641234556, -0.11850301414457275, -0.10803944012150168, 0.3937889403806856, 0.055954942354359306, 0.24590891513686913, 0.03672978419882174, 0.19967433776204976, 0.12014957984278087, 0.018476637796713755, 0.09294481873803306, 0.026352974980209883, 0.1879147123814059, -0.08719009054654564, -0.1899411470288984, 0.011512331566056954, 0.11834930292724703] |
1,802.0174 | Gagliardo-Nirenberg-Sobolev inequalities for convex domains in
$\mathbb{R}^d$ | A special type of Gagliardo-Nirenberg-Sobolev (GNS) inequalities in
$\mathbb{R}^d$ has played a key role in several proofs of Lieb-Thirring
inequalities. Recently, a need for GNS inequalities in convex domains of
$\mathbb{R}^d$, in particular for cubes, has arised. The purpose of this
manuscript is two-fold. First we prove a GNS inequality for convex domains,
with explicit constants which depend on the geometry of the domain. Later,
using the discrete version of Rumin's method, we prove GNS inequalities on
cubes with improved constants.
| math-ph math.AP math.MP | a special type of gagliardonirenbergsobolev gns inequalities in mathbbrd has played a key role in several proofs of liebthirring inequalities recently a need for gns inequalities in convex domains of mathbbrd in particular for cubes has arised the purpose of this manuscript is twofold first we prove a gns inequality for convex domains with explicit constants which depend on the geometry of the domain later using the discrete version of rumins method we prove gns inequalities on cubes with improved constants | [['a', 'special', 'type', 'of', 'gagliardonirenbergsobolev', 'gns', 'inequalities', 'in', 'mathbbrd', 'has', 'played', 'a', 'key', 'role', 'in', 'several', 'proofs', 'of', 'liebthirring', 'inequalities', 'recently', 'a', 'need', 'for', 'gns', 'inequalities', 'in', 'convex', 'domains', 'of', 'mathbbrd', 'in', 'particular', 'for', 'cubes', 'has', 'arised', 'the', 'purpose', 'of', 'this', 'manuscript', 'is', 'twofold', 'first', 'we', 'prove', 'a', 'gns', 'inequality', 'for', 'convex', 'domains', 'with', 'explicit', 'constants', 'which', 'depend', 'on', 'the', 'geometry', 'of', 'the', 'domain', 'later', 'using', 'the', 'discrete', 'version', 'of', 'rumins', 'method', 'we', 'prove', 'gns', 'inequalities', 'on', 'cubes', 'with', 'improved', 'constants']] | [-0.0863358708131587, 0.022117426532700105, -0.10635398775569083, 0.06909432754288485, -0.07626448229047252, -0.11701888147235652, 0.0060081441633771234, 0.33658966242715166, -0.2657019610022321, -0.20529657535622886, 0.17939141887688526, -0.2471006792584825, -0.13324182864600492, 0.23559542909770467, -0.13938853042315186, 0.07135868551968425, 0.04714732801104769, -0.00021475400016815574, -0.09035479943382979, -0.28256920272093494, 0.3948908392569901, -0.09269419933358829, 0.23121648999275984, 0.09254388169695933, 0.10559441097494629, 0.04920662339362833, -0.029038784128648264, 0.009339201827476055, -0.22913539010088568, 0.23928676555105657, 0.24883306181391723, 0.12080592017643797, 0.31756035339685135, -0.42449673221527057, -0.14660597514407134, 0.18015082313299732, 0.14593495636672518, 0.056730670674796, -0.05935553725619145, -0.30885411974870497, 0.007161059244363396, -0.047227027251120705, -0.1632473332473985, -0.06763538168053385, 0.047064619334299625, 0.056454137749510046, -0.30491782915720966, 0.10010766050559872, 0.1194575493235463, 0.08621780780707429, -0.10032993033068416, -0.1359152950944356, 0.0680803794781735, 0.06952917158465695, -0.015694614042769426, 0.03236479379443659, 0.03137848502668886, -0.0357501086646714, -0.15950315046687552, 0.31480950365463894, -0.02872704277045013, -0.2739243101858409, 0.08398171444567219, -0.14774351839240593, -0.24347123584169664, 0.044712336890594916, 0.15154369318006952, 0.16124646938233464, -0.13675091781274037, 0.20119965062074271, -0.13222085777095255, 0.12980714441351823, 0.12244477426564251, 0.10751741142644558, 0.04417188222991464, 0.10378072349596079, 0.1515802045447614, 0.20997360463679574, -0.008096688462961694, -0.1088734219931526, -0.3549024041650104, -0.21425728196347202, -0.23799848887942915, 0.07177713921546568, -0.1360132769152614, -0.1302125663554043, 0.3211866326538133, -0.0003963402288471475, 0.12436633878445, 0.060189755611915, 0.17053462426971505, 0.08530998562842056, 0.07804068362909472, 0.03754563485329718, 0.19255738217889526, 0.1663604526217153, 0.122772302047384, -0.10460256080913508, 0.03003228381621065, 0.20541904524060678] |
1,802.01741 | Toward Marker-free 3D Pose Estimation in Lifting: A Deep Multi-view
Solution | Lifting is a common manual material handling task performed in the
workplaces. It is considered as one of the main risk factors for Work-related
Musculoskeletal Disorders. To improve work place safety, it is necessary to
assess musculoskeletal and biomechanical risk exposures associated with these
tasks, which requires very accurate 3D pose. Existing approaches mainly utilize
marker-based sensors to collect 3D information. However, these methods are
usually expensive to setup, time-consuming in process, and sensitive to the
surrounding environment. In this study, we propose a multi-view based deep
perceptron approach to address aforementioned limitations. Our approach
consists of two modules: a "view-specific perceptron" network extracts rich
information independently from the image of view, which includes both 2D shape
and hierarchical texture information; while a "multi-view integration" network
synthesizes information from all available views to predict accurate 3D pose.
To fully evaluate our approach, we carried out comprehensive experiments to
compare different variants of our design. The results prove that our approach
achieves comparable performance with former marker-based methods, i.e. an
average error of $14.72 \pm 2.96$ mm on the lifting dataset. The results are
also compared with state-of-the-art methods on HumanEva-I dataset, which
demonstrates the superior performance of our approach.
| cs.CV | lifting is a common manual material handling task performed in the workplaces it is considered as one of the main risk factors for workrelated musculoskeletal disorders to improve work place safety it is necessary to assess musculoskeletal and biomechanical risk exposures associated with these tasks which requires very accurate 3d pose existing approaches mainly utilize markerbased sensors to collect 3d information however these methods are usually expensive to setup timeconsuming in process and sensitive to the surrounding environment in this study we propose a multiview based deep perceptron approach to address aforementioned limitations our approach consists of two modules a viewspecific perceptron network extracts rich information independently from the image of view which includes both 2d shape and hierarchical texture information while a multiview integration network synthesizes information from all available views to predict accurate 3d pose to fully evaluate our approach we carried out comprehensive experiments to compare different variants of our design the results prove that our approach achieves comparable performance with former markerbased methods ie an average error of 1472 pm 296 mm on the lifting dataset the results are also compared with stateoftheart methods on humanevai dataset which demonstrates the superior performance of our approach | [['lifting', 'is', 'a', 'common', 'manual', 'material', 'handling', 'task', 'performed', 'in', 'the', 'workplaces', 'it', 'is', 'considered', 'as', 'one', 'of', 'the', 'main', 'risk', 'factors', 'for', 'workrelated', 'musculoskeletal', 'disorders', 'to', 'improve', 'work', 'place', 'safety', 'it', 'is', 'necessary', 'to', 'assess', 'musculoskeletal', 'and', 'biomechanical', 'risk', 'exposures', 'associated', 'with', 'these', 'tasks', 'which', 'requires', 'very', 'accurate', '3d', 'pose', 'existing', 'approaches', 'mainly', 'utilize', 'markerbased', 'sensors', 'to', 'collect', '3d', 'information', 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1,802.01742 | Torus actions, localization and induced representations on cohomology | This note is motivated by the problem of understanding Springer's remarkable
action of the Weyl group $W=N_G(T)/T$ of a semi-simple complex linear algebraic
group $G$, with maximal torus $T$, on the cohomology algebra of an arbitrary
Springer variety in the flag variety of $G$ from the viewpoint of torus
actions. Continuing the work [CK] which gave a sufficient condition for a group
$\mathcal{W}$ acting on the fixed point set of an algebraic torus action
$(S,X)$ on a complex projective variety $X$ to lift to a representation of
$\mathcal{W}$ on the cohomology algebra $H^*(X)$ (over $\mathbb{C}$), we
describe when the representation on $H^*(X)$ is equivalent to the
representation of $\mathcal{W}$ on the cohomology $H^*(X^S)$ of the fixed point
set. As a consequence of this theorem, we give a simple proof in type $A$ of
the Alvis-Lusztig-Treumann Theorem, which describes Springer's representation
of $W$ for Springer varieties corresponding to nilpotents in a Levi subalgebra
of Lie$(G)$. In the final two sections, we describe the local structure of the
moment graph $\mathfrak{M}(X)$ of a special torus action $(S,X)$, and we also
show that if a finite group $\mathcal{W}$ acts on the moment graph of $X$, then
$\mathcal{W}$ induces pair of actions on $H^*(X)$, namely the left and right or
dot and star actions of Knutson [Knu] and Tymoczko [Tym] respectively. In
particular, $W$ acts on the moment (or Bruhat) graph $\mathfrak{M}(G/P)$ of
$(T,G/P)$ for any parabolic $P$ in $G$ containing $T$, and the right action of
$W$ on $H^*(G/P)$ is an induced representation. Furthermore, we show the left
action of $W$ on $H^*(G/P)$ is trivial.
| math.AG | this note is motivated by the problem of understanding springers remarkable action of the weyl group wn_gtt of a semisimple complex linear algebraic group g with maximal torus t on the cohomology algebra of an arbitrary springer variety in the flag variety of g from the viewpoint of torus actions continuing the work ck which gave a sufficient condition for a group mathcalw acting on the fixed point set of an algebraic torus action sx on a complex projective variety x to lift to a representation of mathcalw on the cohomology algebra hx over mathbbc we describe when the representation on hx is equivalent to the representation of mathcalw on the cohomology hxs of the fixed point set as a consequence of this theorem we give a simple proof in type a of the alvislusztigtreumann theorem which describes springers representation of w for springer varieties corresponding to nilpotents in a levi subalgebra of lieg in the final two sections we describe the local structure of the moment graph mathfrakmx of a special torus action sx and we also show that if a finite group mathcalw acts on the moment graph of x then mathcalw induces pair of actions on hx namely the left and right or dot and star actions of knutson knu and tymoczko tym respectively in particular w acts on the moment or bruhat graph mathfrakmgp of tgp for any parabolic p in g containing t and the right action of w on hgp is an induced representation furthermore we show the left action of w on hgp is trivial | [['this', 'note', 'is', 'motivated', 'by', 'the', 'problem', 'of', 'understanding', 'springers', 'remarkable', 'action', 'of', 'the', 'weyl', 'group', 'wn_gtt', 'of', 'a', 'semisimple', 'complex', 'linear', 'algebraic', 'group', 'g', 'with', 'maximal', 'torus', 't', 'on', 'the', 'cohomology', 'algebra', 'of', 'an', 'arbitrary', 'springer', 'variety', 'in', 'the', 'flag', 'variety', 'of', 'g', 'from', 'the', 'viewpoint', 'of', 'torus', 'actions', 'continuing', 'the', 'work', 'ck', 'which', 'gave', 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1,802.01743 | A constrained optimization problem for the Fourier transform: Existence | Among functions majorized by indicator functions of sets with measure one,
which functions have maximal Fourier transforms in the $L^q$ norm? We partially
prove the existence of such functions using techniques from additive
combinatorics to establish a conditional precompactness for maximizing
sequences.
| math.CA | among functions majorized by indicator functions of sets with measure one which functions have maximal fourier transforms in the lq norm we partially prove the existence of such functions using techniques from additive combinatorics to establish a conditional precompactness for maximizing sequences | [['among', 'functions', 'majorized', 'by', 'indicator', 'functions', 'of', 'sets', 'with', 'measure', 'one', 'which', 'functions', 'have', 'maximal', 'fourier', 'transforms', 'in', 'the', 'lq', 'norm', 'we', 'partially', 'prove', 'the', 'existence', 'of', 'such', 'functions', 'using', 'techniques', 'from', 'additive', 'combinatorics', 'to', 'establish', 'a', 'conditional', 'precompactness', 'for', 'maximizing', 'sequences']] | [-0.07362042431209591, 0.05417455269794334, -0.12584608612052675, 0.15912100717070557, 0.010808978872817187, -0.08693465509540624, 0.05696574669508707, 0.35517686929198955, -0.39140913511315983, -0.1997582252647373, 0.13843784826929637, -0.28863472163322423, -0.17630449097071374, 0.215987136721153, -0.10164517369343057, 0.12042704822739497, 0.021437050442078283, 0.0013689985942272912, -0.12442316582781218, -0.236982886901214, 0.3888110949303068, -0.08112629573969614, 0.23722290451682748, 0.0067023650654369875, 0.12706389482177438, 0.07688114847544403, -0.06834801787599212, -0.06896568912391861, -0.16367846526693375, 0.1861479000044277, 0.2663430863980293, 0.20530816701440407, 0.3393466580836546, -0.3511590258927927, -0.15312667895064114, 0.22990724269212, 0.07115400635770389, -0.048838665013179364, -0.030098318416137426, -0.26366264053753447, 0.12123431349616676, -0.08916887272858903, -0.10433651863907774, -0.12202951233346193, -0.021134222458515848, 0.19266223228935683, -0.36658166109451223, 0.06335118319839239, 0.03549845059890123, 0.08670545464736365, -0.09430265924449832, -0.1587687006131524, 0.022035751641461893, 0.09099785813928715, 0.0583319581069407, 0.07965956740025874, 0.058095545862757024, -0.0655963962808961, -0.172258847936367, 0.23857202318807444, -0.08137469865115625, -0.3306265334997858, 0.14041880513763144, -0.2158125585410744, -0.14499456095065744, 0.06488344200798088, 0.1441561228019141, 0.1312599222042731, -0.1446870708438967, 0.11579393134230659, -0.09430095395960268, 0.1261707136318797, 0.11601419165907871, 0.13273553998165188, 0.11055286485879194, 0.032142278050915116, 0.18941006321083045, 0.22861841462907337, 0.027226094555641924, -0.04024426223311041, -0.2744932093967994, -0.10490737271694732, -0.21754801470697635, 0.033020939567081985, -0.11805216831687305, -0.2540033013515529, 0.38123436068140326, 0.01639227720997518, 0.17285110380145766, 0.1419662091287873, 0.23162152292206883, 0.20120991788627135, 0.06975530289180044, 0.06953464033791706, 0.1456869842312742, 0.21518469575814725, -0.022227305896757615, -0.1186050805401811, 0.08896235367726713, 0.24400867510675675] |
1,802.01744 | Shared Autonomy via Deep Reinforcement Learning | In shared autonomy, user input is combined with semi-autonomous control to
achieve a common goal. The goal is often unknown ex-ante, so prior work enables
agents to infer the goal from user input and assist with the task. Such methods
tend to assume some combination of knowledge of the dynamics of the
environment, the user's policy given their goal, and the set of possible goals
the user might target, which limits their application to real-world scenarios.
We propose a deep reinforcement learning framework for model-free shared
autonomy that lifts these assumptions. We use human-in-the-loop reinforcement
learning with neural network function approximation to learn an end-to-end
mapping from environmental observation and user input to agent action values,
with task reward as the only form of supervision. This approach poses the
challenge of following user commands closely enough to provide the user with
real-time action feedback and thereby ensure high-quality user input, but also
deviating from the user's actions when they are suboptimal. We balance these
two needs by discarding actions whose values fall below some threshold, then
selecting the remaining action closest to the user's input. Controlled studies
with users (n = 12) and synthetic pilots playing a video game, and a pilot
study with users (n = 4) flying a real quadrotor, demonstrate the ability of
our algorithm to assist users with real-time control tasks in which the agent
cannot directly access the user's private information through observations, but
receives a reward signal and user input that both depend on the user's intent.
The agent learns to assist the user without access to this private information,
implicitly inferring it from the user's input. This paper is a proof of concept
that illustrates the potential for deep reinforcement learning to enable
flexible and practical assistive systems.
| cs.LG cs.HC cs.RO | in shared autonomy user input is combined with semiautonomous control to achieve a common goal the goal is often unknown exante so prior work enables agents to infer the goal from user input and assist with the task such methods tend to assume some combination of knowledge of the dynamics of the environment the users policy given their goal and the set of possible goals the user might target which limits their application to realworld scenarios we propose a deep reinforcement learning framework for modelfree shared autonomy that lifts these assumptions we use humanintheloop reinforcement learning with neural network function approximation to learn an endtoend mapping from environmental observation and user input to agent action values with task reward as the only form of supervision this approach poses the challenge of following user commands closely enough to provide the user with realtime action feedback and thereby ensure highquality user input but also deviating from the users actions when they are suboptimal we balance these two needs by discarding actions whose values fall below some threshold then selecting the remaining action closest to the users input controlled studies with users n 12 and synthetic pilots playing a video game and a pilot study with users n 4 flying a real quadrotor demonstrate the ability of our algorithm to assist users with realtime control tasks in which the agent cannot directly access the users private information through observations but receives a reward signal and user input that both depend on the users intent the agent learns to assist the user without access to this private information implicitly inferring it from the users input this paper is a proof of concept that illustrates the potential for deep reinforcement learning to enable flexible and practical assistive systems | [['in', 'shared', 'autonomy', 'user', 'input', 'is', 'combined', 'with', 'semiautonomous', 'control', 'to', 'achieve', 'a', 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1,802.01745 | Radiation resistant LGAD design | In this paper, we report on the radiation resistance of 50-micron thick LGAD
detectors manufactured at the Fondazione Bruno Kessler employing several
different doping combinations of the gain layer. LGAD detectors with gain layer
doping of Boron, Boron low-diffusion, Gallium, Carbonated Boron and Carbonated
Gallium have been designed and successfully produced. These sensors have been
exposed to neutron fluences up to $\phi_n \sim 3 \cdot 10^{16}\; n/cm^2$ and to
proton fluences up to $\phi_p \sim 9\cdot10^{15}\; p/cm^2$ to test their
radiation resistance. The experimental results show that Gallium-doped LGADs
are more heavily affected by initial acceptor removal than Boron-doped LGAD,
while the presence of Carbon reduces initial acceptor removal both for Gallium
and Boron doping. Boron low-diffusion shows a higher radiation resistance than
that of standard Boron implant, indicating a dependence of the initial acceptor
removal mechanism upon the implant width. This study also demonstrates that
proton irradiation is at least twice more effective in producing initial
acceptor removal, making proton irradiation far more damaging than neutron
irradiation.
| physics.ins-det hep-ex | in this paper we report on the radiation resistance of 50micron thick lgad detectors manufactured at the fondazione bruno kessler employing several different doping combinations of the gain layer lgad detectors with gain layer doping of boron boron lowdiffusion gallium carbonated boron and carbonated gallium have been designed and successfully produced these sensors have been exposed to neutron fluences up to phi_n sim 3 cdot 1016 ncm2 and to proton fluences up to phi_p sim 9cdot1015 pcm2 to test their radiation resistance the experimental results show that galliumdoped lgads are more heavily affected by initial acceptor removal than borondoped lgad while the presence of carbon reduces initial acceptor removal both for gallium and boron doping boron lowdiffusion shows a higher radiation resistance than that of standard boron implant indicating a dependence of the initial acceptor removal mechanism upon the implant width this study also demonstrates that proton irradiation is at least twice more effective in producing initial acceptor removal making proton irradiation far more damaging than neutron irradiation | [['in', 'this', 'paper', 'we', 'report', 'on', 'the', 'radiation', 'resistance', 'of', '50micron', 'thick', 'lgad', 'detectors', 'manufactured', 'at', 'the', 'fondazione', 'bruno', 'kessler', 'employing', 'several', 'different', 'doping', 'combinations', 'of', 'the', 'gain', 'layer', 'lgad', 'detectors', 'with', 'gain', 'layer', 'doping', 'of', 'boron', 'boron', 'lowdiffusion', 'gallium', 'carbonated', 'boron', 'and', 'carbonated', 'gallium', 'have', 'been', 'designed', 'and', 'successfully', 'produced', 'these', 'sensors', 'have', 'been', 'exposed', 'to', 'neutron', 'fluences', 'up', 'to', 'phi_n', 'sim', '3', 'cdot', '1016', 'ncm2', 'and', 'to', 'proton', 'fluences', 'up', 'to', 'phi_p', 'sim', '9cdot1015', 'pcm2', 'to', 'test', 'their', 'radiation', 'resistance', 'the', 'experimental', 'results', 'show', 'that', 'galliumdoped', 'lgads', 'are', 'more', 'heavily', 'affected', 'by', 'initial', 'acceptor', 'removal', 'than', 'borondoped', 'lgad', 'while', 'the', 'presence', 'of', 'carbon', 'reduces', 'initial', 'acceptor', 'removal', 'both', 'for', 'gallium', 'and', 'boron', 'doping', 'boron', 'lowdiffusion', 'shows', 'a', 'higher', 'radiation', 'resistance', 'than', 'that', 'of', 'standard', 'boron', 'implant', 'indicating', 'a', 'dependence', 'of', 'the', 'initial', 'acceptor', 'removal', 'mechanism', 'upon', 'the', 'implant', 'width', 'this', 'study', 'also', 'demonstrates', 'that', 'proton', 'irradiation', 'is', 'at', 'least', 'twice', 'more', 'effective', 'in', 'producing', 'initial', 'acceptor', 'removal', 'making', 'proton', 'irradiation', 'far', 'more', 'damaging', 'than', 'neutron', 'irradiation']] | [-0.006327322673771954, 0.20215262568829034, 0.013958063981987949, -0.013505049070070113, 0.04380825789879539, -0.19883863371413502, 0.06967519080018189, 0.4482077833956587, -0.1666386237348469, -0.3683210854491074, 0.003108988805328256, -0.4119450185715617, -0.03177937898717954, 0.197390267831792, -0.027040841038377877, 0.0222616406536834, 0.034310495115615826, -0.08380299289906007, -0.08357015205686633, -0.2367722369454422, 0.22588214139080423, 0.16170599136618663, 0.3270612926094118, 0.1326047036445471, 0.06262068246131551, -0.0457699599175318, 0.09062296888049662, -0.04610550947888883, -0.09735690397944986, 0.04706797108450113, 0.22221018445906704, -0.03199521245289884, 0.2116951469253905, -0.5076870547641001, -0.22680401196145636, 0.02008638120239634, 0.08528247023625912, 0.08696035155468805, -0.12335530480620532, -0.22370345729910684, 0.12229916913724856, -0.1821162244451405, -0.08802833393547951, 0.018154964432006, 0.004179107962862148, -0.01009016510058741, -0.23967003541814533, 0.031116778446810354, 0.02551590143124333, 0.030310456088219886, -0.09514646749095824, -0.23310914115344514, -0.09232336888647454, -0.010137038946731718, 0.03376486268965249, 0.04323570230769406, 0.2903169679600455, -0.09037473124959422, -0.02040832528626981, 0.2967906712587856, -0.01833513588496431, -0.05027285004090406, 0.15974431553253246, -0.19543634872314727, -0.0755616121850127, 0.2196860986393681, 0.09786241296692723, 0.13573763478675602, -0.17240477870302107, -0.014874712852649614, 0.05843196359524381, 0.22273522277967725, 0.25245860005271603, 0.030746866624055062, 0.1832969337590262, 0.27451264296106237, 0.04397655156626461, 0.12100978753903134, -0.15252293698617933, 0.08606819524067248, -0.16284491995092995, -0.13507946367894194, -0.10237670165185488, 0.1477365146278164, -0.06579345866199862, -0.1772484626024292, 0.34568896769785773, 0.1138587001331909, 0.11354672125245105, -0.06075926581788027, 0.2580912192965562, 0.0531129367512924, 0.11593758213001967, -0.017545104870282692, 0.2712118702265852, 0.1506097158040673, 0.09629429635747955, -0.23796174276207469, 0.12532219119107874, -0.037092811107345504] |
1,802.01746 | ModelChain: Decentralized Privacy-Preserving Healthcare Predictive
Modeling Framework on Private Blockchain Networks | Cross-institutional healthcare predictive modeling can accelerate research
and facilitate quality improvement initiatives, and thus is important for
national healthcare delivery priorities. For example, a model that predicts
risk of re-admission for a particular set of patients will be more
generalizable if developed with data from multiple institutions. While
privacy-protecting methods to build predictive models exist, most are based on
a centralized architecture, which presents security and robustness
vulnerabilities such as single-point-of-failure (and single-point-of-breach)
and accidental or malicious modification of records. In this article, we
describe a new framework, ModelChain, to adapt Blockchain technology for
privacy-preserving machine learning. Each participating site contributes to
model parameter estimation without revealing any patient health information
(i.e., only model data, no observation-level data, are exchanged across
institutions). We integrate privacy-preserving online machine learning with a
private Blockchain network, apply transaction metadata to disseminate partial
models, and design a new proof-of-information algorithm to determine the order
of the online learning process. We also discuss the benefits and potential
issues of applying Blockchain technology to solve the privacy-preserving
healthcare predictive modeling task and to increase interoperability between
institutions, to support the Nationwide Interoperability Roadmap and national
healthcare delivery priorities such as Patient-Centered Outcomes Research
(PCOR).
| cs.CY cs.CR | crossinstitutional healthcare predictive modeling can accelerate research and facilitate quality improvement initiatives and thus is important for national healthcare delivery priorities for example a model that predicts risk of readmission for a particular set of patients will be more generalizable if developed with data from multiple institutions while privacyprotecting methods to build predictive models exist most are based on a centralized architecture which presents security and robustness vulnerabilities such as singlepointoffailure and singlepointofbreach and accidental or malicious modification of records in this article we describe a new framework modelchain to adapt blockchain technology for privacypreserving machine learning each participating site contributes to model parameter estimation without revealing any patient health information ie only model data no observationlevel data are exchanged across institutions we integrate privacypreserving online machine learning with a private blockchain network apply transaction metadata to disseminate partial models and design a new proofofinformation algorithm to determine the order of the online learning process we also discuss the benefits and potential issues of applying blockchain technology to solve the privacypreserving healthcare predictive modeling task and to increase interoperability between institutions to support the nationwide interoperability roadmap and national healthcare delivery priorities such as patientcentered outcomes research pcor | [['crossinstitutional', 'healthcare', 'predictive', 'modeling', 'can', 'accelerate', 'research', 'and', 'facilitate', 'quality', 'improvement', 'initiatives', 'and', 'thus', 'is', 'important', 'for', 'national', 'healthcare', 'delivery', 'priorities', 'for', 'example', 'a', 'model', 'that', 'predicts', 'risk', 'of', 'readmission', 'for', 'a', 'particular', 'set', 'of', 'patients', 'will', 'be', 'more', 'generalizable', 'if', 'developed', 'with', 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1,802.01747 | Latest Progresses in Developing Wearable Monitoring and Therapy Systems
for Managing Chronic Diseases | Chronic disease is a long-lasting condition that can be controlled but not
cured. Owing to the portability and continuous action, wearable devices are
regarded as promising ways for management and rehabilitation of patients with
chronic diseases. Although the monitoring functions of mobile health care are
in full swing, the research direction along wearable therapy devices has not
been paid with enough attention. The aim of this review paper is to summarize
recent developments in the field of wearable devices, with particular focus on
specific interpretations of therapy for chronic diseases including diabetes,
heart disease, Parkinson's disease, chronic kidney disease and movement
disability after neurologic injuries. A brief summary on the key enabling
technologies allowing for the implementation of wearable monitoring and therapy
devices is given, such as miniaturization of electronic circuits, data analysis
techniques, telecommunication strategy and physical therapy etc. For future
developments, research directions worth of pursuing are outlined.
| physics.med-ph | chronic disease is a longlasting condition that can be controlled but not cured owing to the portability and continuous action wearable devices are regarded as promising ways for management and rehabilitation of patients with chronic diseases although the monitoring functions of mobile health care are in full swing the research direction along wearable therapy devices has not been paid with enough attention the aim of this review paper is to summarize recent developments in the field of wearable devices with particular focus on specific interpretations of therapy for chronic diseases including diabetes heart disease parkinsons disease chronic kidney disease and movement disability after neurologic injuries a brief summary on the key enabling technologies allowing for the implementation of wearable monitoring and therapy devices is given such as miniaturization of electronic circuits data analysis techniques telecommunication strategy and physical therapy etc for future developments research directions worth of pursuing are outlined | [['chronic', 'disease', 'is', 'a', 'longlasting', 'condition', 'that', 'can', 'be', 'controlled', 'but', 'not', 'cured', 'owing', 'to', 'the', 'portability', 'and', 'continuous', 'action', 'wearable', 'devices', 'are', 'regarded', 'as', 'promising', 'ways', 'for', 'management', 'and', 'rehabilitation', 'of', 'patients', 'with', 'chronic', 'diseases', 'although', 'the', 'monitoring', 'functions', 'of', 'mobile', 'health', 'care', 'are', 'in', 'full', 'swing', 'the', 'research', 'direction', 'along', 'wearable', 'therapy', 'devices', 'has', 'not', 'been', 'paid', 'with', 'enough', 'attention', 'the', 'aim', 'of', 'this', 'review', 'paper', 'is', 'to', 'summarize', 'recent', 'developments', 'in', 'the', 'field', 'of', 'wearable', 'devices', 'with', 'particular', 'focus', 'on', 'specific', 'interpretations', 'of', 'therapy', 'for', 'chronic', 'diseases', 'including', 'diabetes', 'heart', 'disease', 'parkinsons', 'disease', 'chronic', 'kidney', 'disease', 'and', 'movement', 'disability', 'after', 'neurologic', 'injuries', 'a', 'brief', 'summary', 'on', 'the', 'key', 'enabling', 'technologies', 'allowing', 'for', 'the', 'implementation', 'of', 'wearable', 'monitoring', 'and', 'therapy', 'devices', 'is', 'given', 'such', 'as', 'miniaturization', 'of', 'electronic', 'circuits', 'data', 'analysis', 'techniques', 'telecommunication', 'strategy', 'and', 'physical', 'therapy', 'etc', 'for', 'future', 'developments', 'research', 'directions', 'worth', 'of', 'pursuing', 'are', 'outlined']] | [-0.09249436526384279, 0.11580670771857836, -0.005773426355456546, 0.02844890116693627, -0.14567089620227583, -0.2425884759028586, 0.02106575466670571, 0.42807006737179804, -0.18070526425836095, -0.21677796532331198, 0.19694218495954452, -0.3200462168745147, -0.23448165719266106, 0.28919999721466294, -0.2308993023263928, 0.06678572370539476, 0.1316747997571783, 0.031162199614282023, 0.04104176612614635, -0.25659665946095506, 0.22553954428318113, 0.03708376877647418, 0.3758748260032911, 0.13639632086488324, 0.05616168864930811, 0.06097455891536786, -0.029968886079904215, -0.050525940904681314, -0.08726866871760978, 0.14682321746727364, 0.4261231229221761, 0.22362472463067895, 0.44079530114095483, -0.5074363212107412, -0.2835651367790247, 0.07511907968913899, 0.13631785954989417, 0.08438872167803096, -0.07348085424687788, -0.3182320057183204, 0.05876511616371385, -0.19531943759062145, -0.16214877830610466, -0.07030329742975183, 0.02316363754247834, 0.03127756671692501, -0.2139114279764073, 0.04782257553177492, -0.0858445910193126, 0.19838667582717978, -0.084216227448286, -0.12796014204508807, 0.004557505696886938, 0.19468797135460597, 0.1438192976275365, 0.0605724214938713, 0.22680082848458083, -0.2249975804295766, -0.1731633046413803, 0.3522421003369327, 0.11952180236393599, -0.11386230511078299, 0.1516153208775471, -0.07955232761087734, -0.12614592496030683, 0.06346070490802494, 0.2182006476393857, 0.07266947885212682, -0.24546659054334632, -0.04650087183811733, 0.14058422856345373, 0.09955614089618918, 0.025705483457661115, 0.03556188024367962, 0.20487648650578805, 0.2809351223814707, 0.02414767983863318, 0.05863040237493763, -0.07435863719153024, -0.01666595857440425, -0.22614933131575185, -0.17598674371026007, -0.06897527201963752, 0.08399347523825036, -0.004289028045214281, -0.16075505729336542, 0.40114561354603945, 0.17690963300123527, 0.04079877282336554, -0.014905131959525132, 0.324404626634697, -0.0017497283703453788, 0.13612351030886374, -0.04375796051908459, 0.10675133944523439, 0.050258734551783424, 0.19798715865151995, -0.22552267936661513, 0.19749975844595782, -0.04802940084580207] |
1,802.01748 | A constrained optimization problem for the Fourier transform:
Quantitative analysis | Among functions $f$ majorized by indicator functions $1_E$, which functions
have maximal ratio $\|\widehat{f}\|_q/|E|^{1/p}$? We establish a quantitative
answer to this question for exponents $q$ sufficiently close to even integers,
building on previous work proving the existence of such maximizers.
| math.CA | among functions f majorized by indicator functions 1_e which functions have maximal ratio widehatf_qe1p we establish a quantitative answer to this question for exponents q sufficiently close to even integers building on previous work proving the existence of such maximizers | [['among', 'functions', 'f', 'majorized', 'by', 'indicator', 'functions', '1_e', 'which', 'functions', 'have', 'maximal', 'ratio', 'widehatf_qe1p', 'we', 'establish', 'a', 'quantitative', 'answer', 'to', 'this', 'question', 'for', 'exponents', 'q', 'sufficiently', 'close', 'to', 'even', 'integers', 'building', 'on', 'previous', 'work', 'proving', 'the', 'existence', 'of', 'such', 'maximizers']] | [-0.16045581792982724, 0.045049721434807934, -0.06501122530645286, 0.10528534520357752, -0.023824032061757185, -0.17957500333730608, 0.1053814544605139, 0.3189584239272592, -0.26236995585406053, -0.25212489775358105, 0.03250443375406739, -0.2805483130117257, -0.1722309627594092, 0.20930984614553894, -0.04003178217233373, 0.10414089740086825, 0.01988462449457401, -0.0031058724778584945, -0.05433214893445182, -0.29871614043338174, 0.34627677519352007, -0.01634736143004818, 0.20981773141867074, 0.13004740179540256, 0.027685032799266852, 0.003209200508605975, -0.015231501143903304, -0.04135118510860663, -0.25014307693494725, 0.11716822444055325, 0.3350328302536255, 0.1434196058827906, 0.3374851357478362, -0.3025069675193383, -0.1551951546795093, 0.2377141344193847, 0.14401944908641803, -0.031252117484258726, -0.017268412785294156, -0.22185911496098226, 0.1730235889315223, -0.10403907179641418, -0.18856624756247187, -0.10849462539100876, 0.09125918038905813, 0.06941340002828301, -0.36571752628645837, 0.044300524613414057, 0.12652876917034006, 0.09727572755386624, -0.08479708117934373, -0.15137068850871843, 0.04700204731227878, 0.10778874850187165, 0.0588171399410548, 0.13218291680543467, 0.062414382345592365, -0.08212701106467882, -0.10568710853560613, 0.24420497564073557, -0.04883905574201773, -0.27475503555093056, 0.16188821306404394, -0.19487949600443244, -0.14546697519910642, 0.011410325299948454, 0.129159537764887, 0.15742807949964815, -0.060907791344783246, 0.10159813199574366, -0.14177390930648798, 0.15358263632664695, 0.14546197292227775, 0.047973367934807755, 0.1638388103292061, 0.009832262204816708, 0.14175583926650384, 0.14652961365974101, 0.1370320088791255, -0.021588801394383877, -0.2753163665198745, -0.11420814162836625, -0.19538508770832172, 0.13560415264398146, -0.10110609654862529, -0.20819772837253717, 0.34657157212495804, 0.09825605339107987, 0.23414923479923835, 0.1543908774978123, 0.20499063691554162, 0.1445228211247386, 0.033464158001618505, 0.07946639706213506, 0.16962446520725885, 0.1521048898844478, -0.0007760029118985701, -0.13236367654724, 0.11103609285484521, 0.20796557850180528] |
1,802.01749 | Impact of medium modification of the nucleon weak and electromagnetic
form factors on the neutrino mean free path in dense matter | Impact of the in-medium modified nucleon weak and electromagnetic form
factors on the neutrino mean free path in dense matter is studied by
considering both the weak and electromagnetic interactions of neutrinos with
the constituents of the matter. A relativistic mean field model and the
quark-meson coupling model are respectively adopted for the in-medium effective
nucleon mass and nucleon form factors. We find that the cross sections of
neutrino scattering in cold nuclear medium decreases when the in-medium
modification of the nucleon weak and electromagnetic form factors are taken
into account. This reduction results in the enhancement of the neutrino mean
free path, in particular at the baryon density of around a few times of the
normal nuclear matter density. The enhancement of the neutrino mean free path
is estimated to be about 10--40\% compared with the values obtained without the
medium modification of the nucleon form factors, and the enhancement is
expected to accelerate the cooling of neutron stars.
| nucl-th astro-ph.HE hep-ex hep-ph nucl-ex | impact of the inmedium modified nucleon weak and electromagnetic form factors on the neutrino mean free path in dense matter is studied by considering both the weak and electromagnetic interactions of neutrinos with the constituents of the matter a relativistic mean field model and the quarkmeson coupling model are respectively adopted for the inmedium effective nucleon mass and nucleon form factors we find that the cross sections of neutrino scattering in cold nuclear medium decreases when the inmedium modification of the nucleon weak and electromagnetic form factors are taken into account this reduction results in the enhancement of the neutrino mean free path in particular at the baryon density of around a few times of the normal nuclear matter density the enhancement of the neutrino mean free path is estimated to be about 1040 compared with the values obtained without the medium modification of the nucleon form factors and the enhancement is expected to accelerate the cooling of neutron stars | [['impact', 'of', 'the', 'inmedium', 'modified', 'nucleon', 'weak', 'and', 'electromagnetic', 'form', 'factors', 'on', 'the', 'neutrino', 'mean', 'free', 'path', 'in', 'dense', 'matter', 'is', 'studied', 'by', 'considering', 'both', 'the', 'weak', 'and', 'electromagnetic', 'interactions', 'of', 'neutrinos', 'with', 'the', 'constituents', 'of', 'the', 'matter', 'a', 'relativistic', 'mean', 'field', 'model', 'and', 'the', 'quarkmeson', 'coupling', 'model', 'are', 'respectively', 'adopted', 'for', 'the', 'inmedium', 'effective', 'nucleon', 'mass', 'and', 'nucleon', 'form', 'factors', 'we', 'find', 'that', 'the', 'cross', 'sections', 'of', 'neutrino', 'scattering', 'in', 'cold', 'nuclear', 'medium', 'decreases', 'when', 'the', 'inmedium', 'modification', 'of', 'the', 'nucleon', 'weak', 'and', 'electromagnetic', 'form', 'factors', 'are', 'taken', 'into', 'account', 'this', 'reduction', 'results', 'in', 'the', 'enhancement', 'of', 'the', 'neutrino', 'mean', 'free', 'path', 'in', 'particular', 'at', 'the', 'baryon', 'density', 'of', 'around', 'a', 'few', 'times', 'of', 'the', 'normal', 'nuclear', 'matter', 'density', 'the', 'enhancement', 'of', 'the', 'neutrino', 'mean', 'free', 'path', 'is', 'estimated', 'to', 'be', 'about', '1040', 'compared', 'with', 'the', 'values', 'obtained', 'without', 'the', 'medium', 'modification', 'of', 'the', 'nucleon', 'form', 'factors', 'and', 'the', 'enhancement', 'is', 'expected', 'to', 'accelerate', 'the', 'cooling', 'of', 'neutron', 'stars']] | [-0.0849895246210508, 0.24322631496179384, -0.07142570989708474, 0.14183940424845787, -0.04468416399904527, 0.0006346568756271153, 0.022105607739649712, 0.35593841472873466, -0.19905554798897357, -0.30635803420445884, -0.04294689665257465, -0.3065308501303662, -0.025580396124860273, 0.12847950643335934, 0.10302724030334502, 0.01316465623322074, 0.03322362056351267, 0.10249026364763267, -0.10515084044163814, -0.18995250305379158, 0.35874775042466356, 0.07250952504400629, 0.21006689514033497, 0.14463108716590795, 0.10098530088725965, 0.031747976140468384, -0.05612402317347005, -0.009993742610095068, -0.10208567186950859, 0.0811657300684601, 0.1711825905891601, 0.053635736933210866, 0.17586235519265755, -0.4336330125777749, -0.22089795670472084, 0.11500500209222082, 0.1267005344183417, 0.10277479399228469, -0.061424027400062184, -0.2813629891781602, 0.06871692992863246, -0.2334617737098597, -0.1466785824741237, -0.03801546044123825, -0.025075162809662287, 0.041206380125368015, -0.28401751730707475, 0.11761031316400476, -0.03612474748952081, -0.022656205741805026, -0.10153002149309032, -0.20475552135612815, 0.02760000454436522, 0.07385546826062636, 0.12517952491762116, 0.06184520431270357, 0.21307690933663254, -0.2562827949252096, -0.019148464562022127, 0.46064395874273034, -0.09731762013689149, -0.14486881444463506, 0.06792889748467132, -0.17575821999635083, -0.061201360421546266, 0.18657712747808547, 0.18176948997715953, 0.05203353357501328, -0.1777088407620795, 0.06830471081557335, -0.046244037919677794, 0.1575379568093922, 0.07530497089610436, 0.06506883064139402, 0.1862480814346327, 0.1813358021521708, -0.0011110560270026326, 0.015454354076791788, -0.11520339518174297, -0.07002849490381777, -0.33664137542073147, -0.10381048260023817, -0.10844797176250723, 0.06974147400469519, -0.13743200031885863, -0.11167546686338028, 0.37235234703402964, 0.06810632870183327, 0.1906552989676129, -0.02366185880964622, 0.30290937738027424, 0.1516226138046477, 0.08763886576052755, 0.09941456073429436, 0.3213450991199352, 0.23148774485307513, 0.06102675278089009, -0.3198685707146069, 0.012496659369207918, 0.04567084912559949] |
1,802.0175 | Seafloor crustal deformation data along the subduction zones around
Japan obtained by GNSS-A observations | Crustal deformation data obtained by geodetic observation networks are
foundations in the fields of geodesy and seismology. These data are essential
for understanding plate motion and earthquake sources and for simulating
earthquake and tsunami disasters. Although relatively scarce, seafloor geodetic
data are particularly important for monitoring the behaviour of undersea
interplate boundary regions. Since the mid-1990s, we have been developing the
combined Global Navigation Satellite System-Acoustic ranging (GNSS-A) technique
for realizing seafloor geodesy. This technique allows us to collect time series
of seafloor crustal deformation. Our published data can be used to investigate
several seismological phenomena along the subduction zones around Japan, namely
the Nankai Trough, Sagami Trough and Japan Trench. These regions are globally
important places in geodesy and seismology and are also suitable for comparison
with other geophysical datasets. Our intention is for these data to promote
further understanding of megathrust zones.
| physics.geo-ph | crustal deformation data obtained by geodetic observation networks are foundations in the fields of geodesy and seismology these data are essential for understanding plate motion and earthquake sources and for simulating earthquake and tsunami disasters although relatively scarce seafloor geodetic data are particularly important for monitoring the behaviour of undersea interplate boundary regions since the mid1990s we have been developing the combined global navigation satellite systemacoustic ranging gnssa technique for realizing seafloor geodesy this technique allows us to collect time series of seafloor crustal deformation our published data can be used to investigate several seismological phenomena along the subduction zones around japan namely the nankai trough sagami trough and japan trench these regions are globally important places in geodesy and seismology and are also suitable for comparison with other geophysical datasets our intention is for these data to promote further understanding of megathrust zones | [['crustal', 'deformation', 'data', 'obtained', 'by', 'geodetic', 'observation', 'networks', 'are', 'foundations', 'in', 'the', 'fields', 'of', 'geodesy', 'and', 'seismology', 'these', 'data', 'are', 'essential', 'for', 'understanding', 'plate', 'motion', 'and', 'earthquake', 'sources', 'and', 'for', 'simulating', 'earthquake', 'and', 'tsunami', 'disasters', 'although', 'relatively', 'scarce', 'seafloor', 'geodetic', 'data', 'are', 'particularly', 'important', 'for', 'monitoring', 'the', 'behaviour', 'of', 'undersea', 'interplate', 'boundary', 'regions', 'since', 'the', 'mid1990s', 'we', 'have', 'been', 'developing', 'the', 'combined', 'global', 'navigation', 'satellite', 'systemacoustic', 'ranging', 'gnssa', 'technique', 'for', 'realizing', 'seafloor', 'geodesy', 'this', 'technique', 'allows', 'us', 'to', 'collect', 'time', 'series', 'of', 'seafloor', 'crustal', 'deformation', 'our', 'published', 'data', 'can', 'be', 'used', 'to', 'investigate', 'several', 'seismological', 'phenomena', 'along', 'the', 'subduction', 'zones', 'around', 'japan', 'namely', 'the', 'nankai', 'trough', 'sagami', 'trough', 'and', 'japan', 'trench', 'these', 'regions', 'are', 'globally', 'important', 'places', 'in', 'geodesy', 'and', 'seismology', 'and', 'are', 'also', 'suitable', 'for', 'comparison', 'with', 'other', 'geophysical', 'datasets', 'our', 'intention', 'is', 'for', 'these', 'data', 'to', 'promote', 'further', 'understanding', 'of', 'megathrust', 'zones']] | [-0.10034193628936583, 0.10530302933820174, -0.06747139243125017, 0.09414726008945112, -0.12611711234950745, -0.05897036505242189, 0.011433909573271898, 0.3609501071016681, -0.2137244879433238, -0.3422872796654701, 0.2198574092777459, -0.2635038669291489, -0.13932120879279805, 0.3225919455025636, -0.08633944277275116, 0.08548733560439734, 0.12386405255302047, -0.045360398135339534, 0.03389751506929702, -0.17141759046848784, 0.23504946458381304, 0.08890773721224239, 0.31212820692635174, 0.0197876148232992, 0.04733964279442629, -0.046609334797509255, -0.10698399278797632, -0.004931581933183451, -0.11850806495095505, 0.14027161839094462, 0.35872644925793856, 0.14189303178647336, 0.23704266871807847, -0.5177815104867761, -0.2786819357763487, 0.06631384111597394, 0.09408689567328807, 0.08169861299290028, -0.020505462006949787, -0.3381029181512641, 0.00909068275008562, -0.13974294561978615, -0.13488849574957598, -0.10896123750861866, 0.1044825679039069, 0.02769597472766652, -0.2301257988801292, 0.064805777284609, 0.004270850326568681, 0.1681171675668435, -0.10415768616127696, -0.09232270272105192, -0.02804185107271088, 0.19895694301800526, 0.0893009288941596, 0.00275242055769587, 0.15103260570136395, -0.0919618108871241, -0.05081083896365149, 0.414707696360886, 0.0008774596722202099, -0.09245296565036401, 0.2234768242713936, -0.16536413964151622, -0.15980681504539035, 0.08391004211454263, 0.2488098976578801, 0.06463797563515233, -0.16292872097250735, 0.004093618221756018, 0.011743331053096088, 0.07119276158921156, 0.11699767421653613, -0.02858600490693505, 0.25826063276605404, 0.20491132177973945, 0.07535189003741422, 0.04753249440736844, -0.2215918928293135, -0.06972201219644292, -0.23947804528849978, -0.11563791892638245, -0.10521141899558088, -0.0227213930437698, -0.0633539559101027, -0.11676269504761799, 0.3538277040414037, 0.18394608079977598, 0.11478904644869506, -0.01820621129574505, 0.27026686096128, 0.004042114740475378, 0.06775571540632147, 0.06138635126887061, 0.2712594839539511, 0.10421688341971566, 0.17840687624766682, -0.14996014593221935, 0.08281988040246863, 0.004797090802685166] |
1,802.01751 | Near-Optimal Coresets of Kernel Density Estimates | We construct near-optimal coresets for kernel density estimates for points in
$\mathbb{R}^d$ when the kernel is positive definite. Specifically we show a
polynomial time construction for a coreset of size $O(\sqrt{d}/\varepsilon\cdot
\sqrt{\log 1/\varepsilon} )$, and we show a near-matching lower bound of size
$\Omega(\min\{\sqrt{d}/\varepsilon, 1/\varepsilon^2\})$. When $d\geq
1/\varepsilon^2$, it is known that the size of coreset can be
$O(1/\varepsilon^2)$. The upper bound is a polynomial-in-$(1/\varepsilon)$
improvement when $d \in [3,1/\varepsilon^2)$ and the lower bound is the first
known lower bound to depend on $d$ for this problem. Moreover, the upper bound
restriction that the kernel is positive definite is significant in that it
applies to a wide-variety of kernels, specifically those most important for
machine learning. This includes kernels for information distances and the sinc
kernel which can be negative.
| cs.LG cs.CG stat.ML | we construct nearoptimal coresets for kernel density estimates for points in mathbbrd when the kernel is positive definite specifically we show a polynomial time construction for a coreset of size osqrtdvarepsiloncdot sqrtlog 1varepsilon and we show a nearmatching lower bound of size omegaminsqrtdvarepsilon 1varepsilon2 when dgeq 1varepsilon2 it is known that the size of coreset can be o1varepsilon2 the upper bound is a polynomialin1varepsilon improvement when d in 31varepsilon2 and the lower bound is the first known lower bound to depend on d for this problem moreover the upper bound restriction that the kernel is positive definite is significant in that it applies to a widevariety of kernels specifically those most important for machine learning this includes kernels for information distances and the sinc kernel which can be negative | [['we', 'construct', 'nearoptimal', 'coresets', 'for', 'kernel', 'density', 'estimates', 'for', 'points', 'in', 'mathbbrd', 'when', 'the', 'kernel', 'is', 'positive', 'definite', 'specifically', 'we', 'show', 'a', 'polynomial', 'time', 'construction', 'for', 'a', 'coreset', 'of', 'size', 'osqrtdvarepsiloncdot', 'sqrtlog', '1varepsilon', 'and', 'we', 'show', 'a', 'nearmatching', 'lower', 'bound', 'of', 'size', 'omegaminsqrtdvarepsilon', '1varepsilon2', 'when', 'dgeq', '1varepsilon2', 'it', 'is', 'known', 'that', 'the', 'size', 'of', 'coreset', 'can', 'be', 'o1varepsilon2', 'the', 'upper', 'bound', 'is', 'a', 'polynomialin1varepsilon', 'improvement', 'when', 'd', 'in', '31varepsilon2', 'and', 'the', 'lower', 'bound', 'is', 'the', 'first', 'known', 'lower', 'bound', 'to', 'depend', 'on', 'd', 'for', 'this', 'problem', 'moreover', 'the', 'upper', 'bound', 'restriction', 'that', 'the', 'kernel', 'is', 'positive', 'definite', 'is', 'significant', 'in', 'that', 'it', 'applies', 'to', 'a', 'widevariety', 'of', 'kernels', 'specifically', 'those', 'most', 'important', 'for', 'machine', 'learning', 'this', 'includes', 'kernels', 'for', 'information', 'distances', 'and', 'the', 'sinc', 'kernel', 'which', 'can', 'be', 'negative']] | [-0.0974404499977827, 0.10791642943024635, -0.0984303393214941, 0.11659921519085766, -0.08108995433413656, -0.17159994293376804, 0.06407430522516369, 0.3449261039942503, -0.2298378455089405, -0.27944558135792613, 0.12161800897587091, -0.27282300689816474, -0.15280449905246496, 0.2415256050005555, -0.0614452681466937, 0.0803089880021289, 0.05709651373326778, 0.09731850179471076, -0.07979233295843005, -0.31927675372362135, 0.319394402416423, 0.04084907925501466, 0.2301614523609169, 0.12217526213079691, 0.07821783654391766, -0.0522771845087409, 0.02469976771250367, -0.01956628745049238, -0.14886785987223267, 0.13289138357993216, 0.24592783358693124, 0.1487424415498972, 0.29025040617585185, -0.3337741610705853, -0.16055323639302516, 0.1727378667090088, 0.15770687786862253, 0.09966840508859605, -0.010604684782214463, -0.1997419011425227, 0.13692134358827024, -0.09126879481598735, -0.0880150775059592, -0.053364088452421125, 0.10443967738747596, -0.010386379512026906, -0.36883065140247345, 0.072338323418051, 0.15224195162951945, -0.0298356041056104, -0.06484710401296616, -0.2027159445658326, 0.07062948672100902, 0.0755434737780597, -0.03766151844337583, 0.0912167054573074, 0.04745622789859772, -0.10945421137660742, -0.0734624543134123, 0.2828296997174621, -0.11264400536380709, -0.24203733830526472, 0.13691559589654206, -0.1480077095925808, -0.13181063221395015, 0.1237170192450285, 0.22370529426261782, 0.1557211977876723, -0.08116250963311177, 0.1662000330821611, -0.11932805996853858, 0.17889900289475918, 0.09567733812332153, 0.03618589029088616, 0.044937226556241515, 0.1542902062330395, 0.2014596905792132, 0.1601418728288263, -0.048181992495432494, -0.056438639160245656, -0.3028492912650108, -0.17057730952906422, -0.2782967191785574, 0.04935841740109027, -0.18866127159039026, -0.17454050916433334, 0.29808491307497026, 0.11290373288467527, 0.24327102119103075, 0.15743455870542675, 0.2872450847774744, 0.1653217492438853, 0.07778602311760187, 0.18243852058053017, 0.17073905090242625, 0.07101260339049623, -0.01806752184778452, -0.17006957296282052, 0.11391497419774532, 0.10949853412248194] |
1,802.01752 | On the chordality of polynomial sets in triangular decomposition in
top-down style | In this paper the chordal graph structures of polynomial sets appearing in
triangular decomposition in top-down style are studied when the input
polynomial set to decompose has a chordal associated graph. In particular, we
prove that the associated graph of one specific triangular set computed in any
algorithm for triangular decomposition in top-down style is a subgraph of the
chordal graph of the input polynomial set and that all the polynomial sets
including all the computed triangular sets appearing in one specific
simply-structured algorithm for triangular decomposition in top-down style
(Wang's method) have associated graphs which are subgraphs of the the chordal
graph of the input polynomial set. These subgraph structures in triangular
decomposition in top-down style are multivariate generalization of existing
results for Gaussian elimination and may lead to specialized efficient
algorithms and refined complexity analyses for triangular decomposition of
chordal polynomial sets.
| cs.SC | in this paper the chordal graph structures of polynomial sets appearing in triangular decomposition in topdown style are studied when the input polynomial set to decompose has a chordal associated graph in particular we prove that the associated graph of one specific triangular set computed in any algorithm for triangular decomposition in topdown style is a subgraph of the chordal graph of the input polynomial set and that all the polynomial sets including all the computed triangular sets appearing in one specific simplystructured algorithm for triangular decomposition in topdown style wangs method have associated graphs which are subgraphs of the the chordal graph of the input polynomial set these subgraph structures in triangular decomposition in topdown style are multivariate generalization of existing results for gaussian elimination and may lead to specialized efficient algorithms and refined complexity analyses for triangular decomposition of chordal polynomial sets | [['in', 'this', 'paper', 'the', 'chordal', 'graph', 'structures', 'of', 'polynomial', 'sets', 'appearing', 'in', 'triangular', 'decomposition', 'in', 'topdown', 'style', 'are', 'studied', 'when', 'the', 'input', 'polynomial', 'set', 'to', 'decompose', 'has', 'a', 'chordal', 'associated', 'graph', 'in', 'particular', 'we', 'prove', 'that', 'the', 'associated', 'graph', 'of', 'one', 'specific', 'triangular', 'set', 'computed', 'in', 'any', 'algorithm', 'for', 'triangular', 'decomposition', 'in', 'topdown', 'style', 'is', 'a', 'subgraph', 'of', 'the', 'chordal', 'graph', 'of', 'the', 'input', 'polynomial', 'set', 'and', 'that', 'all', 'the', 'polynomial', 'sets', 'including', 'all', 'the', 'computed', 'triangular', 'sets', 'appearing', 'in', 'one', 'specific', 'simplystructured', 'algorithm', 'for', 'triangular', 'decomposition', 'in', 'topdown', 'style', 'wangs', 'method', 'have', 'associated', 'graphs', 'which', 'are', 'subgraphs', 'of', 'the', 'the', 'chordal', 'graph', 'of', 'the', 'input', 'polynomial', 'set', 'these', 'subgraph', 'structures', 'in', 'triangular', 'decomposition', 'in', 'topdown', 'style', 'are', 'multivariate', 'generalization', 'of', 'existing', 'results', 'for', 'gaussian', 'elimination', 'and', 'may', 'lead', 'to', 'specialized', 'efficient', 'algorithms', 'and', 'refined', 'complexity', 'analyses', 'for', 'triangular', 'decomposition', 'of', 'chordal', 'polynomial', 'sets']] | [-0.09921805282485568, 0.032800537098309074, -0.047628920551182494, 0.05840455719994174, -0.13692633715820396, -0.11907740919074665, -0.023480250185659517, 0.41520346583436346, -0.36672003304637557, -0.24607836636843988, 0.12758403961682538, -0.23826382338948962, -0.16002155982682276, 0.16765214349207883, -0.09118012085350023, 0.08088138681422505, 0.12342264308568297, 0.06872272971344905, -0.016579784042227805, -0.26441363105813154, 0.310767655112108, -0.057367867913045406, 0.23567112181465039, 0.021644711623796158, 0.08921274838050725, 0.021545781960917845, -0.07126210299773245, 0.07261059527000827, -0.13919811894740836, 0.13911283088317658, 0.288583525042567, 0.17380196424427494, 0.1940010669786716, -0.42108450232384104, -0.11177872192476773, 0.1944806366550943, 0.16773195779791827, 0.08787167959235376, 0.020585343589320675, -0.20647473573788172, 0.13478814164409414, -0.0991092714571601, -0.03819809965110229, -0.08738868176523182, 0.017942370918010257, -0.005642746077177839, -0.30400334374927396, 0.0163528986611507, 0.14103937010966344, 0.06600707089708319, 0.037945048230338015, -0.2003115715180886, -0.010846863649526818, 0.05488734352406431, -0.1323916111869039, 0.03671872779765787, 0.06541500887962887, -0.11542308943494896, -0.21704400923853326, 0.35144672447091174, -0.0022524594775556275, -0.21902243671421376, 0.12934476155917057, -0.10661303739632583, -0.24654153770340295, 0.11445991222151658, 0.16609392216843036, 0.11682027985807508, -0.10913312056042439, 0.13506548769793073, -0.1382999007279674, 0.07051237286779927, 0.18109416707173093, 0.0028019709926512507, 0.1129346335073933, 0.13752714727242063, 0.14178361875140885, 0.21701493958405788, 0.022128854320827587, -0.07789948346584828, -0.24417105779543313, -0.07544641489059561, -0.22495368186597867, -0.0384804526822538, -0.25130327875346364, -0.27023430813440225, 0.4520439520581729, 0.08269151526413528, 0.1802732139581672, 0.09719929246623199, 0.25020415079779923, 0.07403995404901151, 0.046950165793532506, 0.12792404172230615, 0.09692039948842851, 0.16533988364972174, 0.03640492429258302, -0.15406076855611495, 0.08756800861091404, 0.20381452820988166] |
1,802.01753 | Random products of maps synchronizing on average | We present a necessary and sufficient condition for a random product of maps
on a compact metric space to be (strongly) synchronizing on average.
| math.DS | we present a necessary and sufficient condition for a random product of maps on a compact metric space to be strongly synchronizing on average | [['we', 'present', 'a', 'necessary', 'and', 'sufficient', 'condition', 'for', 'a', 'random', 'product', 'of', 'maps', 'on', 'a', 'compact', 'metric', 'space', 'to', 'be', 'strongly', 'synchronizing', 'on', 'average']] | [-0.18035413417965174, 0.1669448173197452, -0.0782245925317208, 0.0701831088711818, -0.07374642184004188, -0.11267494947727148, 0.09824606395947437, 0.44898363078633946, -0.17881705689554414, -0.19992938358336687, 0.19572972089129811, -0.18194148282054812, -0.1594872249600788, 0.22908900464729717, -0.10673702294783045, 0.03904165048152208, 0.11365403172870477, 0.1283255935801814, -0.0875977862548704, -0.2580271041418503, 0.4157600658945739, 0.045569243802068136, 0.2441926443716511, 0.07680086279287934, 0.18144119748224816, -0.010293640196323395, -0.022849193609242018, 0.08590208508030628, -0.1602799732160444, 0.1409776663252463, 0.1215246831998229, 0.1769701006511847, 0.23988822878648838, -0.3661131439730525, -0.18179277140491953, 0.19400412833783776, 0.048187192218999066, 0.032628929863373436, -0.03471868167980574, -0.30660746976112324, 0.12802133123235157, -0.10463577276095748, -0.06124085164628923, -0.1072563068009913, 0.06817129840298246, 0.02265444576429824, -0.3611101338950296, -0.007172994626065095, 0.07504285274383922, 0.026331160120510805, -0.11282256113675733, 0.01791955189158519, 0.01783208401563267, 0.10874660889385268, -0.13933720951899886, 0.08473834473018844, 0.0708198063269568, -0.04743212880566716, -0.039283625587510564, 0.3736057630740106, -0.1349085459175209, -0.29792453822058934, 0.21677877303833762, -0.1335199337142209, -0.18756998206178346, 0.09031854859010006, 0.26207499159500003, 0.15928751269044975, -0.12199014568856607, 0.03234254930430325, -0.0810415456071496, 0.1752490148258706, 0.03165764497437825, 0.057163034876187645, 0.18844833713956177, 0.14486181671964005, 0.23012219454782704, 0.18754396709361268, 0.024618158912441384, 0.009484129026532173, -0.3505209639358024, -0.19602015241980553, -0.17209543163577715, 0.10904360019291441, -0.11815993953435584, -0.2331491025785605, 0.39977091680824134, 0.06062811799347401, 0.22572600981220603, 0.10511352253767352, 0.2504894382630785, 0.12037762846011901, 0.008276987432812652, 0.09038031194359064, 0.10285417145739, 0.18196159694343805, 0.00522693475553145, -0.12769771902821958, 0.04744150448823348, 0.11572105400652315] |
1,802.01754 | How to select the best set of ads: Can we do better than Greedy
Algorithm? | Selecting the best set of ads is critical for advertisers for a given set of
keywords, which involves the composition of ads from millions of candidates.
While click through rates (CTRs) are important, there could be high correlation
among different ads, therefore the set of ads with top CTRs does not
necessarily maximize the number of clicks. Greedy algorithm has been a standard
and straightforward way to find out a decent enough solution, however, it is
not guaranteed to be the global optimum. In fact, it proves not to be the
global optimum more than 70% of the time across all our simulations, implying
that it's very likely to be trapped at a local optimum. In this paper, we
propose a Greedy-Power Algorithm to find out the best set of creatives, that is
starting with the solution from the conventional Greedy Algorithm, one can
perform another Greedy Algorithm search on top of it, with the option of a few
or even infinite rounds. The Greedy-Power algorithm is guaranteed to be not
worse, as it only moves in the direction to increase the goal function. We show
that Greedy-Power Algorithm's performance is consistently better, and reach the
conclusion that it is able to perform better than the Greedy Algorithm
systematically.
| cs.DS | selecting the best set of ads is critical for advertisers for a given set of keywords which involves the composition of ads from millions of candidates while click through rates ctrs are important there could be high correlation among different ads therefore the set of ads with top ctrs does not necessarily maximize the number of clicks greedy algorithm has been a standard and straightforward way to find out a decent enough solution however it is not guaranteed to be the global optimum in fact it proves not to be the global optimum more than 70 of the time across all our simulations implying that its very likely to be trapped at a local optimum in this paper we propose a greedypower algorithm to find out the best set of creatives that is starting with the solution from the conventional greedy algorithm one can perform another greedy algorithm search on top of it with the option of a few or even infinite rounds the greedypower algorithm is guaranteed to be not worse as it only moves in the direction to increase the goal function we show that greedypower algorithms performance is consistently better and reach the conclusion that it is able to perform better than the greedy algorithm systematically | [['selecting', 'the', 'best', 'set', 'of', 'ads', 'is', 'critical', 'for', 'advertisers', 'for', 'a', 'given', 'set', 'of', 'keywords', 'which', 'involves', 'the', 'composition', 'of', 'ads', 'from', 'millions', 'of', 'candidates', 'while', 'click', 'through', 'rates', 'ctrs', 'are', 'important', 'there', 'could', 'be', 'high', 'correlation', 'among', 'different', 'ads', 'therefore', 'the', 'set', 'of', 'ads', 'with', 'top', 'ctrs', 'does', 'not', 'necessarily', 'maximize', 'the', 'number', 'of', 'clicks', 'greedy', 'algorithm', 'has', 'been', 'a', 'standard', 'and', 'straightforward', 'way', 'to', 'find', 'out', 'a', 'decent', 'enough', 'solution', 'however', 'it', 'is', 'not', 'guaranteed', 'to', 'be', 'the', 'global', 'optimum', 'in', 'fact', 'it', 'proves', 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1,802.01755 | Dynamic Spatial Panel Models: Networks, Common Shocks, and Sequential
Exogeneity | This paper considers a class of GMM estimators for general dynamic panel
models, allowing for weakly exogenous covariates and cross sectional dependence
due to spatial lags, unspecified common shocks and time-varying interactive
effects. We significantly expand the scope of the existing literature by
allowing for endogenous spatial weight matrices without imposing any
restrictions on how the weights are generated. An important area of application
is in social interaction and network models where our specification can
accommodate data dependent network formation. We consider an exemplary social
interaction model and show how identification of the interaction parameters is
achieved through a combination of linear and quadratic moment conditions. For
the general setup we develop an orthogonal forward differencing transformation
to aid in the estimation of factor components while maintaining orthogonality
of moment conditions. This is an important ingredient to a tractable asymptotic
distribution of our estimators. In general, the asymptotic distribution of our
estimators is found to be mixed normal due to random norming. However, the
asymptotic distribution of our test statistics is still chi-square.
| math.ST stat.TH | this paper considers a class of gmm estimators for general dynamic panel models allowing for weakly exogenous covariates and cross sectional dependence due to spatial lags unspecified common shocks and timevarying interactive effects we significantly expand the scope of the existing literature by allowing for endogenous spatial weight matrices without imposing any restrictions on how the weights are generated an important area of application is in social interaction and network models where our specification can accommodate data dependent network formation we consider an exemplary social interaction model and show how identification of the interaction parameters is achieved through a combination of linear and quadratic moment conditions for the general setup we develop an orthogonal forward differencing transformation to aid in the estimation of factor components while maintaining orthogonality of moment conditions this is an important ingredient to a tractable asymptotic distribution of our estimators in general the asymptotic distribution of our estimators is found to be mixed normal due to random norming however the asymptotic distribution of our test statistics is still chisquare | [['this', 'paper', 'considers', 'a', 'class', 'of', 'gmm', 'estimators', 'for', 'general', 'dynamic', 'panel', 'models', 'allowing', 'for', 'weakly', 'exogenous', 'covariates', 'and', 'cross', 'sectional', 'dependence', 'due', 'to', 'spatial', 'lags', 'unspecified', 'common', 'shocks', 'and', 'timevarying', 'interactive', 'effects', 'we', 'significantly', 'expand', 'the', 'scope', 'of', 'the', 'existing', 'literature', 'by', 'allowing', 'for', 'endogenous', 'spatial', 'weight', 'matrices', 'without', 'imposing', 'any', 'restrictions', 'on', 'how', 'the', 'weights', 'are', 'generated', 'an', 'important', 'area', 'of', 'application', 'is', 'in', 'social', 'interaction', 'and', 'network', 'models', 'where', 'our', 'specification', 'can', 'accommodate', 'data', 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1,802.01756 | Highly accurate model for prediction of lung nodule malignancy with CT
scans | Computed tomography (CT) examinations are commonly used to predict lung
nodule malignancy in patients, which are shown to improve noninvasive early
diagnosis of lung cancer. It remains challenging for computational approaches
to achieve performance comparable to experienced radiologists. Here we present
NoduleX, a systematic approach to predict lung nodule malignancy from CT data,
based on deep learning convolutional neural networks (CNN). For training and
validation, we analyze >1000 lung nodules in images from the LIDC/IDRI cohort.
All nodules were identified and classified by four experienced thoracic
radiologists who participated in the LIDC project. NoduleX achieves high
accuracy for nodule malignancy classification, with an AUC of ~0.99. This is
commensurate with the analysis of the dataset by experienced radiologists. Our
approach, NoduleX, provides an effective framework for highly accurate nodule
malignancy prediction with the model trained on a large patient population. Our
results are replicable with software available at
http://bioinformatics.astate.edu/NoduleX.
| cs.CV q-bio.QM stat.ML | computed tomography ct examinations are commonly used to predict lung nodule malignancy in patients which are shown to improve noninvasive early diagnosis of lung cancer it remains challenging for computational approaches to achieve performance comparable to experienced radiologists here we present nodulex a systematic approach to predict lung nodule malignancy from ct data based on deep learning convolutional neural networks cnn for training and validation we analyze 1000 lung nodules in images from the lidcidri cohort all nodules were identified and classified by four experienced thoracic radiologists who participated in the lidc project nodulex achieves high accuracy for nodule malignancy classification with an auc of 099 this is commensurate with the analysis of the dataset by experienced radiologists our approach nodulex provides an effective framework for highly accurate nodule malignancy prediction with the model trained on a large patient population our results are replicable with software available at httpbioinformaticsastateedunodulex | [['computed', 'tomography', 'ct', 'examinations', 'are', 'commonly', 'used', 'to', 'predict', 'lung', 'nodule', 'malignancy', 'in', 'patients', 'which', 'are', 'shown', 'to', 'improve', 'noninvasive', 'early', 'diagnosis', 'of', 'lung', 'cancer', 'it', 'remains', 'challenging', 'for', 'computational', 'approaches', 'to', 'achieve', 'performance', 'comparable', 'to', 'experienced', 'radiologists', 'here', 'we', 'present', 'nodulex', 'a', 'systematic', 'approach', 'to', 'predict', 'lung', 'nodule', 'malignancy', 'from', 'ct', 'data', 'based', 'on', 'deep', 'learning', 'convolutional', 'neural', 'networks', 'cnn', 'for', 'training', 'and', 'validation', 'we', 'analyze', '1000', 'lung', 'nodules', 'in', 'images', 'from', 'the', 'lidcidri', 'cohort', 'all', 'nodules', 'were', 'identified', 'and', 'classified', 'by', 'four', 'experienced', 'thoracic', 'radiologists', 'who', 'participated', 'in', 'the', 'lidc', 'project', 'nodulex', 'achieves', 'high', 'accuracy', 'for', 'nodule', 'malignancy', 'classification', 'with', 'an', 'auc', 'of', '099', 'this', 'is', 'commensurate', 'with', 'the', 'analysis', 'of', 'the', 'dataset', 'by', 'experienced', 'radiologists', 'our', 'approach', 'nodulex', 'provides', 'an', 'effective', 'framework', 'for', 'highly', 'accurate', 'nodule', 'malignancy', 'prediction', 'with', 'the', 'model', 'trained', 'on', 'a', 'large', 'patient', 'population', 'our', 'results', 'are', 'replicable', 'with', 'software', 'available', 'at', 'httpbioinformaticsastateedunodulex']] | [0.062339506301607284, -0.03537319270528953, -0.031943450801426895, 0.07753091221801131, -0.0556690138166871, -0.203691112274002, 0.024346299705447983, 0.44035911883819046, -0.10865960862311358, -0.3571176756727132, 0.08275676644926362, -0.32641753568502796, -0.18044506933428411, 0.25235862796968855, -0.19202021215224285, 0.1128507984260953, 0.191110365910808, 0.03194737065633809, 0.02257898887399131, -0.36125481272166643, 0.20597194769495242, 0.049980013352634724, 0.37758537189644836, 0.020705458881157275, 0.12872926018443084, -0.07149846250870945, -0.042180957496040374, -0.001662352103488268, -0.0559208678023424, 0.17299822290904657, 0.4102331190747586, 0.22218478332600883, 0.3387837747200015, -0.37918022324054224, -0.2267977588674733, 0.07297989422914798, 0.13581487039934742, 0.0979706111821862, 0.002716443221386824, -0.38046028535511045, 0.10816195101407985, -0.16689000848202487, 0.0034424162963782815, -0.15721827568140234, -0.03992501003872226, -0.10035274268090222, -0.3213997486651548, 0.17326165498545035, -0.08490080508164356, 0.17128212229864723, -0.15352349492683504, -0.1515519382963838, 0.004734982566505268, 0.2243675100585647, 0.016620945201941288, 0.14411652701390856, 0.17475754101571903, -0.22261879787107022, -0.1348322876036872, 0.31252800300638695, 0.019860740190975973, -0.14572025516001205, 0.19624488133893073, -0.07346328634869408, -0.122680829088298, 0.17466569422568018, 0.2513499713087505, 0.14021327325797364, -0.20365348241505893, -0.1398860693797532, 0.05031928640941309, 0.19049001002615015, 0.014705372895617541, -0.12658826723172506, 0.14058293385007986, 0.31753393099014016, -0.12238340139722552, 0.10850851716492577, -0.22870522646887884, 0.06002380147991652, -0.1679332965254985, -0.1564278230203805, -0.13623507946770563, -0.01555886449263985, -0.08414377250714146, -0.18838304811298084, 0.3924389752005604, 0.2095507323471326, 0.12956695850762362, 0.09995680689147825, 0.30137571604368657, -0.05475900481719322, 0.1383185409869986, 0.0351614646937673, 0.22606860507103438, -0.0358772118767799, 0.06091345511604969, -0.22098900542619662, 0.1494415458291769, 0.04116570999266932] |
1,802.01757 | Topological symmetries of simply-connected four-manifolds and actions of
automorphism groups of free groups | Let $M$ be a simply connected closed $4$-manifold. It is proved that any
(possibly finite) compact Lie group acting effectively and homologically
trivially on $M$ by homeomorphisms is an abelian group of rank at most two. As
applications, let $\mathrm{Aut}(F_{n})$ be the automorphism group of the free
group of rank $n.$ We prove that any group action of $\mathrm{Aut}% (F_{n})$
$(n\geq 4)$ on $M\neq S^{4}$ by homologically trivial homeomorphisms factors
through $\mathbb{Z}/2.$ Moreover, any action of $% \mathrm{SL}_{n}(\mathbb{Q})$
$(n\geq 4)$ on $M\neq S^{4}$ by homeomorphisms is trivial.
| math.GT math.AT math.DS | let m be a simply connected closed 4manifold it is proved that any possibly finite compact lie group acting effectively and homologically trivially on m by homeomorphisms is an abelian group of rank at most two as applications let mathrmautf_n be the automorphism group of the free group of rank n we prove that any group action of mathrmaut f_n ngeq 4 on mneq s4 by homologically trivial homeomorphisms factors through mathbbz2 moreover any action of mathrmsl_nmathbbq ngeq 4 on mneq s4 by homeomorphisms is trivial | [['let', 'm', 'be', 'a', 'simply', 'connected', 'closed', '4manifold', 'it', 'is', 'proved', 'that', 'any', 'possibly', 'finite', 'compact', 'lie', 'group', 'acting', 'effectively', 'and', 'homologically', 'trivially', 'on', 'm', 'by', 'homeomorphisms', 'is', 'an', 'abelian', 'group', 'of', 'rank', 'at', 'most', 'two', 'as', 'applications', 'let', 'mathrmautf_n', 'be', 'the', 'automorphism', 'group', 'of', 'the', 'free', 'group', 'of', 'rank', 'n', 'we', 'prove', 'that', 'any', 'group', 'action', 'of', 'mathrmaut', 'f_n', 'ngeq', '4', 'on', 'mneq', 's4', 'by', 'homologically', 'trivial', 'homeomorphisms', 'factors', 'through', 'mathbbz2', 'moreover', 'any', 'action', 'of', 'mathrmsl_nmathbbq', 'ngeq', '4', 'on', 'mneq', 's4', 'by', 'homeomorphisms', 'is', 'trivial']] | [-0.27151227168300573, 0.19468601355483234, -0.06763679670608219, -0.02243210815906744, -0.11981041225988198, -0.21764887605848557, -0.007003409766099032, 0.3965004409937298, -0.2661358343944063, -0.20229299867196995, 0.16828181069782552, -0.2921234499224845, -0.12151893180904581, 0.21889982389522414, -0.15662637245567407, -0.1380258755032521, 0.0036812088233144843, 0.19544570720480645, -0.07804957082878579, -0.2948760767850806, 0.4008658491951578, -0.15663654351716533, 0.15184068520662977, 0.056164804632392, 0.11047256769721998, 0.006965428585296168, 0.021917587387211182, 0.011273630987852811, -0.1009713547586751, 0.026925051420488778, 0.3213991886114373, -0.007284593447933302, 0.18117146222468686, -0.3659303061883239, -0.20133338052341165, 0.26080177215968864, 0.1504544919493663, -0.11780487147762495, -0.019063125672640607, -0.32106079467955756, 0.16462525584022789, -0.1624632775564404, -0.15990436002338196, -0.05540139869074611, 0.11254440221990294, -0.06543145733063711, -0.20847797678673968, -0.0658918478361824, 0.13132400909329162, 0.1488126813160146, -0.02072453494183719, -0.0701314417508376, -0.12703808427733534, 0.153197065387469, -0.02884057337034713, 0.142270678533789, 0.1531980902175693, 0.014762252147364267, -0.1126810011563494, 0.3859493424075053, -0.09906719325055532, -0.27954189238302846, 0.10232510506449377, -0.1947253913837759, -0.2096580998862491, 0.15394478686811292, 0.039607707367223854, 0.19665861496879883, 0.0029427758363239904, 0.28480269279919895, -0.16569044023533078, 0.16424194743363735, 0.08008742905495798, -0.12064758290481918, 0.08303821515291929, 0.05560283253845923, 0.19153756753486745, 0.052954788530683694, 0.12393198937780278, 0.12827045217375546, -0.36439926282447926, -0.17042532670585547, -0.15503827567924472, 0.2601377246600083, -0.1683781587626607, -0.12051232606172561, 0.3240202489582931, -0.013683871190775843, 0.111601280903115, 0.15844046828912242, 0.19343224663068267, -0.0013758604401065146, 0.09307106441872962, 0.16180443563772476, -0.009462900180369615, 0.2155687280026648, -0.23903598606257753, -0.14912897709428388, -0.05970647284103667, 0.26909630478852814] |
1,802.01758 | Selective Near Perfect Light Absorbtion by Graphene Monolayer Using
Aperiodic Multilayer Microstructures | We investigate 1D aperiodic multilayer microstructures in order to achieve
near total absorption in preselected wavelengths in a graphene monolayer. Our
structures are designed by a genetic optimization algorithm coupled to a
transfer matrix code. Coupled mode theory (CMT) analysis, in accordance with
transfer matrix method (TMM) results, indicates the existence of a critical
coupling in a graphene monolayer for perfect absorptions. Our findings show
that the near-total-absorption peaks are highly tunable and can be controlled
simultaneously or independently in wide range of wavelengths in the
near-infrared and visible. Our proposed approach is metal free and does not
require surface texturing or patterning, and can be applied for other two
dimensional (2D) materials.
| physics.optics | we investigate 1d aperiodic multilayer microstructures in order to achieve near total absorption in preselected wavelengths in a graphene monolayer our structures are designed by a genetic optimization algorithm coupled to a transfer matrix code coupled mode theory cmt analysis in accordance with transfer matrix method tmm results indicates the existence of a critical coupling in a graphene monolayer for perfect absorptions our findings show that the neartotalabsorption peaks are highly tunable and can be controlled simultaneously or independently in wide range of wavelengths in the nearinfrared and visible our proposed approach is metal free and does not require surface texturing or patterning and can be applied for other two dimensional 2d materials | [['we', 'investigate', '1d', 'aperiodic', 'multilayer', 'microstructures', 'in', 'order', 'to', 'achieve', 'near', 'total', 'absorption', 'in', 'preselected', 'wavelengths', 'in', 'a', 'graphene', 'monolayer', 'our', 'structures', 'are', 'designed', 'by', 'a', 'genetic', 'optimization', 'algorithm', 'coupled', 'to', 'a', 'transfer', 'matrix', 'code', 'coupled', 'mode', 'theory', 'cmt', 'analysis', 'in', 'accordance', 'with', 'transfer', 'matrix', 'method', 'tmm', 'results', 'indicates', 'the', 'existence', 'of', 'a', 'critical', 'coupling', 'in', 'a', 'graphene', 'monolayer', 'for', 'perfect', 'absorptions', 'our', 'findings', 'show', 'that', 'the', 'neartotalabsorption', 'peaks', 'are', 'highly', 'tunable', 'and', 'can', 'be', 'controlled', 'simultaneously', 'or', 'independently', 'in', 'wide', 'range', 'of', 'wavelengths', 'in', 'the', 'nearinfrared', 'and', 'visible', 'our', 'proposed', 'approach', 'is', 'metal', 'free', 'and', 'does', 'not', 'require', 'surface', 'texturing', 'or', 'patterning', 'and', 'can', 'be', 'applied', 'for', 'other', 'two', 'dimensional', '2d', 'materials']] | [-0.08691765183591217, 0.12246588284116504, -0.047773090932293726, -0.020275518263848165, -0.02595518604357494, -0.1953403302302052, 0.02229987086008935, 0.48412468143007054, -0.2467057044518047, -0.314753317679528, 0.04450096951768501, -0.268914971126443, -0.1914817875180493, 0.21032157971889578, -0.012450126656663738, 0.062872310734487, 0.06603541218542627, -0.09532967750315688, -0.03832420380993946, -0.19486231654549815, 0.2585048194326061, 0.014772054764242577, 0.33496508642981226, 0.06446732280476551, 0.0321730268146244, -0.013339034036367334, 0.03596226382900828, 0.03575886916119738, -0.10065342409227794, 0.10609658733093445, 0.28719901529672953, -0.01735620273809348, 0.23113059436270436, -0.42382719662522766, -0.27444174049222575, 0.02224193387831162, 0.16527716896962374, 0.14781173508630932, -0.07702757208192322, -0.2291738053318113, 0.09672541615405603, -0.1016652437933122, -0.10841658299406325, -0.07199900798150338, -0.06868705042039178, 0.012191336827007555, -0.3066146005585324, 0.039973743280695216, 0.011336924371010224, 0.04314707756774234, -0.09345250302326999, -0.08622208574005137, -0.06520825750236067, 0.07896974085763629, -0.04455299586074294, -0.003776004484929477, 0.14707535515689024, -0.09288235981700511, -0.11931940767265457, 0.3909169986977109, -0.11644135199873874, -0.17247907739199167, 0.223466099331355, -0.13648201933912268, -0.05859373830857554, 0.18141698435647413, 0.1712962131839179, 0.145573755447653, -0.14214196995765502, 0.05368551083250038, -0.02030290215043351, 0.2390631662398976, 0.06531241285015962, 0.044109151378506795, 0.24398684175061394, 0.1766562218046082, 0.03824799531815058, 0.11742949610353597, -0.09459832325332432, -0.043594509591847394, -0.20407512724133475, -0.161640717818435, -0.21221651011390869, 0.04064857772144543, -0.08218718588666109, -0.19172859311220236, 0.4079677955347246, 0.16266410489073937, 0.1630734006716271, -0.007637289587624504, 0.25555923660951, 0.1043448761754137, 0.11859526474394702, 0.03142874412670998, 0.2726876655776453, 0.137394425943577, 0.08919460031652957, -0.20943667425308377, 0.028113306874209747, -0.0023538238684912877] |
1,802.01759 | Global Bifurcation of Dynamical Systems and Nonlinear Evolution
Equations | We establish new global bifurcation theorems for dynamical systems in terms
of local semiflows on complete metric spaces. These theorems are applied to the
nonlinear evolution equation $u_t+A u=f_\lambda(u)$ in a Banach space $X$,
where $A$ is a sectorial operator with compact resolvent. Assume that $0$ is
always a trivial stationary solution of the equation. We show that the global
dynamic bifurcation branch $\Gamma$ of a bifurcation point $(0,\lambda_0)$
either meets another bifurcation point $(0,\lambda_1)$, or is unbounded,
completely extending the well-known Rabinowitz Global Bifurcation Theorem on
operator equations to nonlinear evolution equations without any restrictions on
the crossing number. In the case where $f_\lambda(u)=\lambda u+f(u)$, due to
the {\em nonnegativity} of the Conley index we can even prove a stronger
conclusion asserting that only one possibility occurs for $\Gamma$, that is,
$\Gamma$ is necessarily unbounded. This result can be expected to help us have
a deeper understanding of the dynamics of nonlinear evolution equations.
As another example of applications of the abstract bifurcation theorems, we
also discuss the bifurcation and the existence of nontrivial solutions of the
elliptic equation $-\Delta u=f_\lambda(u)$ on a bounded domain in
$\mathbb{R}^n$ ($n\geq 3$) associated with the homogenous Dirichlet boundary
condition. Some new results with global features are obtained.
| math.DS | we establish new global bifurcation theorems for dynamical systems in terms of local semiflows on complete metric spaces these theorems are applied to the nonlinear evolution equation u_ta uf_lambdau in a banach space x where a is a sectorial operator with compact resolvent assume that 0 is always a trivial stationary solution of the equation we show that the global dynamic bifurcation branch gamma of a bifurcation point 0lambda_0 either meets another bifurcation point 0lambda_1 or is unbounded completely extending the wellknown rabinowitz global bifurcation theorem on operator equations to nonlinear evolution equations without any restrictions on the crossing number in the case where f_lambdaulambda ufu due to the em nonnegativity of the conley index we can even prove a stronger conclusion asserting that only one possibility occurs for gamma that is gamma is necessarily unbounded this result can be expected to help us have a deeper understanding of the dynamics of nonlinear evolution equations as another example of applications of the abstract bifurcation theorems we also discuss the bifurcation and the existence of nontrivial solutions of the elliptic equation delta uf_lambdau on a bounded domain in mathbbrn ngeq 3 associated with the homogenous dirichlet boundary condition some new results with global features are obtained | [['we', 'establish', 'new', 'global', 'bifurcation', 'theorems', 'for', 'dynamical', 'systems', 'in', 'terms', 'of', 'local', 'semiflows', 'on', 'complete', 'metric', 'spaces', 'these', 'theorems', 'are', 'applied', 'to', 'the', 'nonlinear', 'evolution', 'equation', 'u_ta', 'uf_lambdau', 'in', 'a', 'banach', 'space', 'x', 'where', 'a', 'is', 'a', 'sectorial', 'operator', 'with', 'compact', 'resolvent', 'assume', 'that', '0', 'is', 'always', 'a', 'trivial', 'stationary', 'solution', 'of', 'the', 'equation', 'we', 'show', 'that', 'the', 'global', 'dynamic', 'bifurcation', 'branch', 'gamma', 'of', 'a', 'bifurcation', 'point', 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